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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Hot Days, Warm Nights and Frost Days by Decade

How often hot days, warm nights, frost days and ice days occur by decade since the 1960s worldwide, from a fixed set of up to 2,481 stations. Built from NOAA GHCN-Daily station records by this site; every chart states its stations and its period.

Data as of . Last revised (2026-10-17).

Key Facts

  • Worldwide, the mean number of days with a daily maximum at or above 30 C (86 F) per year at 2,481 stations rose from 48.5 to 54.6 between the 1960s and the 2010s; the 2020s so far (6 years) average 57.0.
  • Worldwide, the mean number of days with a daily maximum at or above 35 C (95 F) per year at 2,481 stations rose from 10.4 to 13.1 between the 1960s and the 2010s; the 2020s so far (6 years) average 14.2.
  • Worldwide, the mean number of days with a daily maximum at or above 40 C (104 F) per year at 2,481 stations rose from 1.0 to 1.5 between the 1960s and the 2010s; the 2020s so far (6 years) average 1.8.
  • Worldwide, the mean number of warm nights, with a daily minimum at or above 20 C (68 F) per year at 2,304 stations rose from 20.3 to 28.3 between the 1960s and the 2010s; the 2020s so far (6 years) average 28.6.
  • Worldwide, the mean number of frost days, with a daily minimum at or below 0 C (32 F) per year at 2,304 stations fell from 117.7 to 107.0 between the 1960s and the 2010s; the 2020s so far (6 years) average 103.1.
  • Worldwide, the mean number of ice days, with a daily maximum at or below 0 C (32 F) per year at 2,481 stations fell from 35.4 to 31.5 between the 1960s and the 2010s; the 2020s so far (6 years) average 26.0.
  • Each code uses its own fixed set of stations, the same in every decade from the 1960s, so the change comes from the same places.
  • The same measures are on this page for 4 continents and 17 countries.

How to Read This Page

Each chart counts days in a year that cross a temperature line: a daily maximum at or above 30 C (86 F), 35 C (95 F) or 40 C (104 F); a warm night, when the daily minimum stays at or above 20 C (68 F); a frost day, when the daily minimum is 0 C (32 F) or lower; and an ice day, when even the daily maximum is 0 C (32 F) or lower. Each bar is the mean number of such days per year in one decade.

The station set is fixed for each measure. A station is in the set only when it has at least 6 complete years in every decade from the 1960s to the 2010s and at least 3 in the 2020s, so the same places are compared decade after decade and a change in which stations report cannot move the bars. A year is complete when all 12 months have at least 20 days of both the daily maximum and the daily minimum. A measure appears for a scope only when at least 10 stations are in its set. The 2020s are not over, so that bar covers only the complete years so far.

Stations are not spread evenly: some regions have many and others few, so a continent or world figure describes the stations in the set and not every place. Every figure here describes what the station records show. It does not say why it changed. Stations that do not have enough complete years in every decade are left out, which favours long running stations in well covered countries.

This page has the world, 4 continents and 17 countries with data. Each scope has its own station sets, named in its charts.

Hot Days, Warm Nights and Frost Days by Decade: World

Up to 2,481 stations per measure, fixed sets

Days at or above 30 C

Days at or above 30 C: mean days per year by decade, World Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 15 30 45 60 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 30 C: mean days per year by decade, World
DecadeMean days per year
1960s48.5
1970s48.6
1980s50.3
1990s48.2
2000s51.0
2010s54.6
2020s (so far, 6 years)57.0

Days at or above 35 C

Days at or above 35 C: mean days per year by decade, World Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 3.8 7.5 11 15 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 35 C: mean days per year by decade, World
DecadeMean days per year
1960s10.4
1970s10.1
1980s12.2
1990s10.7
2000s11.9
2010s13.1
2020s (so far, 6 years)14.2

Days at or above 40 C

Days at or above 40 C: mean days per year by decade, World Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 0.5 1.0 1.5 2.0 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 40 C: mean days per year by decade, World
DecadeMean days per year
1960s1.0
1970s1.0
1980s1.3
1990s1.1
2000s1.3
2010s1.5
2020s (so far, 6 years)1.8

Tropical nights (min at or above 20 C)

Tropical nights (min at or above 20 C): mean days per year by decade, World Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), World. The same 2,304 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 7.5 15 23 30 1960s1970s1980s1990s2000s2010s2020s
Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), World. The same 2,304 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Tropical nights (min at or above 20 C): mean days per year by decade, World
DecadeMean days per year
1960s20.3
1970s21.2
1980s23.3
1990s23.7
2000s24.8
2010s28.3
2020s (so far, 6 years)28.6

Frost days (min at or below 0 C)

Frost days (min at or below 0 C): mean days per year by decade, World Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), World. The same 2,304 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 30 60 90 120 1960s1970s1980s1990s2000s2010s2020s
Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), World. The same 2,304 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Frost days (min at or below 0 C): mean days per year by decade, World
DecadeMean days per year
1960s117.7
1970s115.9
1980s113.5
1990s108.8
2000s108.4
2010s107.0
2020s (so far, 6 years)103.1

Ice days (max at or below 0 C)

Ice days (max at or below 0 C): mean days per year by decade, World Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 10 20 30 40 1960s1970s1980s1990s2000s2010s2020s
Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), World. The same 2,481 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Ice days (max at or below 0 C): mean days per year by decade, World
DecadeMean days per year
1960s35.4
1970s34.7
1980s33.7
1990s30.2
2000s30.4
2010s31.5
2020s (so far, 6 years)26.0

Each measure counts days in complete years only. A station is in a measure's set when it has complete years in every decade from the 1960s, so each chart compares the same places over time. A grey bar is a decade that is not over.

All climate measures for World

Hot Days, Warm Nights and Frost Days by Decade: Asia

Up to 103 stations per measure, fixed sets

Days at or above 30 C

Days at or above 30 C: mean days per year by decade, Asia Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 20 40 60 80 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 30 C: mean days per year by decade, Asia
DecadeMean days per year
1960s58.9
1970s57.5
1980s57.6
1990s60.9
2000s65.9
2010s68.6
2020s (so far, 6 years)76.1

Days at or above 35 C

Days at or above 35 C: mean days per year by decade, Asia Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 6.3 13 19 25 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 35 C: mean days per year by decade, Asia
DecadeMean days per year
1960s12.8
1970s12.7
1980s13.3
1990s15.1
2000s16.5
2010s19.8
2020s (so far, 6 years)22.6

Days at or above 40 C

Days at or above 40 C: mean days per year by decade, Asia Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 0.8 1.5 2.3 3.0 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 40 C: mean days per year by decade, Asia
DecadeMean days per year
1960s1.0
1970s1.2
1980s1.4
1990s1.4
2000s1.4
2010s2.5
2020s (so far, 6 years)2.5

Ice days (max at or below 0 C)

Ice days (max at or below 0 C): mean days per year by decade, Asia Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 13 25 38 50 1960s1970s1980s1990s2000s2010s2020s
Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Asia. The same 103 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Ice days (max at or below 0 C): mean days per year by decade, Asia
DecadeMean days per year
1960s41.0
1970s41.7
1980s41.3
1990s37.4
2000s35.5
2010s35.9
2020s (so far, 6 years)30.5

Each measure counts days in complete years only. A station is in a measure's set when it has complete years in every decade from the 1960s, so each chart compares the same places over time. A grey bar is a decade that is not over.

All climate measures for Asia

Hot Days, Warm Nights and Frost Days by Decade: Europe

Up to 590 stations per measure, fixed sets

Days at or above 30 C

Days at or above 30 C: mean days per year by decade, Europe Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 3.8 7.5 11 15 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 30 C: mean days per year by decade, Europe
DecadeMean days per year
1960s6.8
1970s6.2
1980s7.2
1990s9.2
2000s11.0
2010s13.3
2020s (so far, 6 years)14.8

Days at or above 35 C

Days at or above 35 C: mean days per year by decade, Europe Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 0.8 1.5 2.3 3.0 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 35 C: mean days per year by decade, Europe
DecadeMean days per year
1960s0.8
1970s0.6
1980s1.0
1990s1.2
2000s1.7
2010s2.2
2020s (so far, 6 years)2.9

Days at or above 40 C

Days at or above 40 C: mean days per year by decade, Europe Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 0.1 0.1 0.2 0.3 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 40 C: mean days per year by decade, Europe
DecadeMean days per year
1960s0.0
1970s0.0
1980s0.1
1990s0.1
2000s0.1
2010s0.1
2020s (so far, 6 years)0.2

Tropical nights (min at or above 20 C)

Tropical nights (min at or above 20 C): mean days per year by decade, Europe Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), Europe. The same 571 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 1.5 3.0 4.5 6.0 1960s1970s1980s1990s2000s2010s2020s
Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), Europe. The same 571 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Tropical nights (min at or above 20 C): mean days per year by decade, Europe
DecadeMean days per year
1960s2.0
1970s1.9
1980s2.5
1990s3.3
2000s3.9
2010s4.7
2020s (so far, 6 years)5.6

Frost days (min at or below 0 C)

Frost days (min at or below 0 C): mean days per year by decade, Europe Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Europe. The same 571 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 30 60 90 120 1960s1970s1980s1990s2000s2010s2020s
Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Europe. The same 571 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Frost days (min at or below 0 C): mean days per year by decade, Europe
DecadeMean days per year
1960s110.1
1970s106.6
1980s106.1
1990s98.8
2000s94.8
2010s92.8
2020s (so far, 6 years)85.0

Ice days (max at or below 0 C)

Ice days (max at or below 0 C): mean days per year by decade, Europe Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 13 25 38 50 1960s1970s1980s1990s2000s2010s2020s
Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Europe. The same 590 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Ice days (max at or below 0 C): mean days per year by decade, Europe
DecadeMean days per year
1960s47.5
1970s40.5
1980s43.7
1990s37.2
2000s34.8
2010s34.8
2020s (so far, 6 years)27.4

Each measure counts days in complete years only. A station is in a measure's set when it has complete years in every decade from the 1960s, so each chart compares the same places over time. A grey bar is a decade that is not over.

All climate measures for Europe

Hot Days, Warm Nights and Frost Days by Decade: North America

Up to 1,715 stations per measure, fixed sets

Days at or above 30 C

Days at or above 30 C: mean days per year by decade, North America Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 20 40 60 80 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 30 C: mean days per year by decade, North America
DecadeMean days per year
1960s60.2
1970s60.5
1980s62.4
1990s58.5
2000s61.3
2010s65.4
2020s (so far, 6 years)67.9

Days at or above 35 C

Days at or above 35 C: mean days per year by decade, North America Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 5.0 10 15 20 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 35 C: mean days per year by decade, North America
DecadeMean days per year
1960s12.8
1970s12.5
1980s15.2
1990s13.0
2000s14.3
2010s15.4
2020s (so far, 6 years)16.7

Days at or above 40 C

Days at or above 40 C: mean days per year by decade, North America Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 0.6 1.3 1.9 2.5 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 40 C: mean days per year by decade, North America
DecadeMean days per year
1960s1.2
1970s1.2
1980s1.5
1990s1.3
2000s1.6
2010s1.7
2020s (so far, 6 years)2.2

Tropical nights (min at or above 20 C)

Tropical nights (min at or above 20 C): mean days per year by decade, North America Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), North America. The same 1,658 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 10 20 30 40 1960s1970s1980s1990s2000s2010s2020s
Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), North America. The same 1,658 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Tropical nights (min at or above 20 C): mean days per year by decade, North America
DecadeMean days per year
1960s24.2
1970s25.4
1980s27.9
1990s28.1
2000s29.5
2010s33.8
2020s (so far, 6 years)33.9

Frost days (min at or below 0 C)

Frost days (min at or below 0 C): mean days per year by decade, North America Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), North America. The same 1,658 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 38 75 113 150 1960s1970s1980s1990s2000s2010s2020s
Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), North America. The same 1,658 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Frost days (min at or below 0 C): mean days per year by decade, North America
DecadeMean days per year
1960s125.4
1970s124.0
1980s120.9
1990s116.9
2000s117.6
2010s116.5
2020s (so far, 6 years)113.7

Ice days (max at or below 0 C)

Ice days (max at or below 0 C): mean days per year by decade, North America Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 10 20 30 40 1960s1970s1980s1990s2000s2010s2020s
Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), North America. The same 1,715 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Ice days (max at or below 0 C): mean days per year by decade, North America
DecadeMean days per year
1960s32.4
1970s33.8
1980s31.3
1990s28.6
2000s29.9
2010s31.4
2020s (so far, 6 years)26.3

Each measure counts days in complete years only. A station is in a measure's set when it has complete years in every decade from the 1960s, so each chart compares the same places over time. A grey bar is a decade that is not over.

All climate measures for North America

Hot Days, Warm Nights and Frost Days by Decade: Oceania

Up to 68 stations per measure, fixed sets

Days at or above 30 C

Days at or above 30 C: mean days per year by decade, Oceania Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 30 60 90 120 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 30 C (86 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 30 C: mean days per year by decade, Oceania
DecadeMean days per year
1960s99.7
1970s100.5
1980s107.8
1990s106.5
2000s112.3
2010s116.8
2020s (so far, 6 years)115.4

Days at or above 35 C

Days at or above 35 C: mean days per year by decade, Oceania Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 10 20 30 40 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 35 C (95 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 35 C: mean days per year by decade, Oceania
DecadeMean days per year
1960s28.1
1970s26.5
1980s30.1
1990s29.4
2000s32.1
2010s34.7
2020s (so far, 6 years)34.5

Days at or above 40 C

Days at or above 40 C: mean days per year by decade, Oceania Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 2.0 4.0 6.0 8.0 1960s1970s1980s1990s2000s2010s2020s
Mean days with a daily maximum at or above 40 C (104 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Days at or above 40 C: mean days per year by decade, Oceania
DecadeMean days per year
1960s4.5
1970s4.5
1980s5.5
1990s5.2
2000s6.0
2010s7.1
2020s (so far, 6 years)6.6

Tropical nights (min at or above 20 C)

Tropical nights (min at or above 20 C): mean days per year by decade, Oceania Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), Oceania. The same 67 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 25 50 75 100 1960s1970s1980s1990s2000s2010s2020s
Mean warm nights, with a daily minimum at or above 20 C (68 F) per year, by decade (1960s to 2020s), Oceania. The same 67 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Tropical nights (min at or above 20 C): mean days per year by decade, Oceania
DecadeMean days per year
1960s81.2
1970s83.9
1980s86.1
1990s86.5
2000s87.9
2010s92.5
2020s (so far, 6 years)93.3

Frost days (min at or below 0 C)

Frost days (min at or below 0 C): mean days per year by decade, Oceania Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Oceania. The same 67 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 1.3 2.5 3.8 5.0 1960s1970s1980s1990s2000s2010s2020s
Mean frost days, with a daily minimum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Oceania. The same 67 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Frost days (min at or below 0 C): mean days per year by decade, Oceania
DecadeMean days per year
1960s4.6
1970s4.2
1980s4.1
1990s4.1
2000s4.7
2010s4.2
2020s (so far, 6 years)3.4

Ice days (max at or below 0 C)

Ice days (max at or below 0 C): mean days per year by decade, Oceania Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far. 0.0 0.3 0.5 0.8 1.0 1960s1970s1980s1990s2000s2010s2020s
Mean ice days, with a daily maximum at or below 0 C (32 F) per year, by decade (1960s to 2020s), Oceania. The same 68 stations are in every decade: each has complete years in every decade from the 1960s, so a change in the station mix cannot move the bars. The 2020s are not over: 6 years so far.
Ice days (max at or below 0 C): mean days per year by decade, Oceania
DecadeMean days per year
1960s0.0
1970s0.0
1980s0.0
1990s0.0
2000s0.0
2010s0.0
2020s (so far, 6 years)0.0

Each measure counts days in complete years only. A station is in a measure's set when it has complete years in every decade from the 1960s, so each chart compares the same places over time. A grey bar is a decade that is not over.

All climate measures for Oceania

Countries

17 with data
Countries ranked by the change in mean days at or above 30 c per year, first to last complete decade
CountryStationsDays per year, first decadeDays per year, last complete decadeChange in days per year
Croatia1214.9 (1960s)38.9 (2010s)+24.0
Romania2022.0 (1960s)42.9 (2010s)+20.9
Australia6387.4 (1960s)102.1 (2010s)+14.7
Kazakhstan1356.9 (1960s)70.9 (2010s)+14.0
Spain4442.7 (1960s)56.6 (2010s)+13.9
France348.6 (1960s)20.5 (2010s)+11.9
Japan2946.9 (1960s)56.8 (2010s)+9.8
Germany1814.0 (1960s)11.2 (2010s)+7.2
China3948.8 (1960s)55.1 (2010s)+6.3
United States1,70960.0 (1960s)65.2 (2010s)+5.2
Russia385.3 (1960s)9.8 (2010s)+4.4
Netherlands121.7 (1960s)5.5 (2010s)+3.8
Estonia150.4 (1960s)3.2 (2010s)+2.8
Finland480.1 (1960s)1.6 (2010s)+1.5
Sweden620.3 (1960s)1.3 (2010s)+1.0
United Kingdom490.1 (1960s)0.6 (2010s)+0.6
Norway420.1 (1960s)0.4 (2010s)+0.3

Ordered by the change in mean days per year between the first decade (1960s) and the last complete decade (2010s) for: Days at or above 30 C. Each country's own fixed station set is used; the station count is in the second column.

Download the Data

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17. The figures are computed by this site from daily station records. They describe the stations in each set, not every place.