Climate Trends in Netherlands

• In Netherlands, the mean number of days with a daily maximum at or above 30 C (86 F) per year at 12 stations rose from 1.7 to 5.5 between the 1960s and the 2010s; the 2020s so far (6 years) average 7.0.
• In Netherlands, the mean number of days with a daily maximum at or above 35 C (95 F) per year at 12 stations rose from 0.0 to 0.7 between the 1960s and the 2010s; the 2020s so far (6 years) average 0.5.
• In Netherlands, the mean number of days with a daily maximum at or above 40 C (104 F) per year at 12 stations was 0.0 in both between the 1960s and the 2010s; the 2020s so far (6 years) average 0.0.
• In Netherlands, the mean number of warm nights, with a daily minimum at or above 20 C (68 F) per year at 12 stations rose from 0.0 to 0.6 between the 1960s and the 2010s; the 2020s so far (6 years) average 0.7.
• In Netherlands, the mean number of frost days, with a daily minimum at or below 0 C (32 F) per year at 12 stations fell from 71.5 to 52.2 between the 1960s and the 2010s; the 2020s so far (6 years) average 40.3.
• In Netherlands, the mean number of ice days, with a daily maximum at or below 0 C (32 F) per year at 12 stations fell from 15.3 to 7.4 between the 1960s and the 2010s; the 2020s so far (6 years) average 2.6.

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.

• In Netherlands, annual rain at 283 stations is shown as a percent difference from each station's own 1961-1990 mean, for 75 years from 1951 to 2025.
• The trend in annual rain is +4.4 percent per decade (95 percent interval +2.6 to +6.2), fitted to 75 years from 1951 to 2025.
• In Netherlands, the share of a year's rain that fell in its wettest five days was 7.8 in both percent between the 1960s and the 2020s at 256 stations.
• In Netherlands, the mean number of days with 25 mm (1.0 in) or more of rain per year rose from 2.17 to 2.69 between the 1960s and the 2020s.
• In Netherlands, the mean number of days with 50 mm (2.0 in) or more of rain per year fell from 0.15 to 0.14 between the 1960s and the 2020s.
• In Netherlands, the mean number of days with 100 mm (3.9 in) or more of rain per year was 0.00 in both between the 1960s and the 2020s.
• In Netherlands, the mean longest dry spell of the year, in days with less than 1 mm of rain in a row, fell from 35.4 to 26.8 days between the 1960s and the 2020s, over the same 256 stations in every decade.

Annual rain against the 1961-1990 mean

The annual rain series uses stations with at least 50 complete years since 1951 and a 1961-1990 baseline. The decade charts use fixed sets of stations, the same in every decade from the 1960s. A dry day has less than 1 mm (0.04 in) of rain.

• In Netherlands, the longest run of hot days in a row in the data is 3 days, at Arcen (Netherlands), from 6 August 2003 to 8 August 2003.
• In Netherlands, the longest run of days in a row at or above 40 C in the data is 1 day, at Woensdrecht (Netherlands), from 25 July 2019 to 25 July 2019.
• In Netherlands, the longest run of frost days in a row in the data is 77 days, at Eelde (Netherlands), from 19 December 1962 to 5 March 1963.
• In Netherlands, the longest run of ice days in a row in the data is 34 days, at Groningen (Netherlands), from 22 January 1947 to 24 February 1947.
• In Netherlands, the longest run of dry days in a row in the data is 341 days, at Kapellebrug (Netherlands), in 1958.
• In Netherlands, the longest run of wet days in a row in the data is 38 days, at Vlieland_1 (Netherlands), in 2000.

Longest run of days at or above 35 C

Consecutive days with a daily maximum at or above 35 C (95 F).

Longest run of days at or above 40 C

Consecutive days with a daily maximum at or above 40 C (104 F).

Longest run of frost days (minimum at or below 0 C)

Consecutive days with a daily minimum at or below 0 C (32 F).

Longest run of ice days (maximum at or below 0 C)

Consecutive days with a daily maximum at or below 0 C (32 F).

Longest dry spell (days under 1 mm of rain), within one year

Consecutive days with less than 1 mm (0.04 in) of rain, the longest run within a year. The dates are not kept, so the list gives the year (within the year).

Longest wet spell (days with 1 mm or more of rain), within one year

Consecutive days with 1 mm (0.04 in) or more of rain, the longest run within a year. The dates are not kept, so the list gives the year (within the year).

A run belongs to the year it started in, even when it ran on into the next year. A station appears once per list, with its longest run in a complete year. Dry and wet spells are the longest run within a year. Lists use complete years only, so a long run in a year with gaps in the record is not counted.

• In Netherlands, the mean number of days per season with snow on the ground (25 mm or more, 1.0 in) at 184 stations fell from 10.5 to 2.4 between the 1960s and the 2020s.
• In Netherlands, the mean number of heavy snowfall days per season (100 mm or more, 3.9 in, in a day) was 0.00 in both between the 1960s and the 2020s.
• The trend in snow cover days is -1.2 days per decade (95 percent interval -2.2 to -0.2), fitted to 66 seasons from 1960 to 2025.

A snow season runs from 1 July to 30 June and is labelled by the year it starts in, so 2009-10 is the season of 2009. A season is complete when at least 150 days report snow depth. The set holds stations at 20 degrees north or further north with at least 5 snow cover days per season on average in 1961-1990 and complete seasons in every decade.

• In Netherlands, the largest reported one day rise in the daily maximum is 16.2 C (29.2 F), at Eelde (Netherlands) on 21 March 1929.
• In Netherlands, the largest reported one day drop in the daily maximum is 17.9 C (32.2 F), at De Bilt (Netherlands) on 13 June 1919.
• In Netherlands, the largest reported one day rise in the daily minimum is 20.0 C (36.0 F), at De Bilt (Netherlands) on 28 January 1942.
• In Netherlands, the largest reported one day drop in the daily minimum is 17.3 C (31.1 F), at Wageningen - Haarweg (Netherlands) on 30 December 1978.
• In Netherlands, the largest reported range between the high and the low of one day is 25.5 C (45.9 F), at Volkel (Netherlands) on 14 September 1964.
• In Netherlands, the smallest reported range between the high and the low of one day is 0.1 C (0.2 F), at Rotterdam (Netherlands) on 25 December 1958.

Caveat.Single readings can still be instrument errors that quality control missed. A station with one faulty value can top a list, so read each entry as a reported value, not as a confirmed event.

Biggest one day rise in the daily maximum

The largest increase in the daily maximum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day drop in the daily maximum

The largest decrease in the daily maximum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day rise in the daily minimum

The largest increase in the daily minimum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day drop in the daily minimum

The largest decrease in the daily minimum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Widest range between the high and the low of one day

The largest difference between the highest and the lowest temperature of the same day. Values are in degrees Celsius with Fahrenheit beside them.

Narrowest range between the high and the low of one day

The smallest difference between the highest and the lowest temperature of the same day. Values are in degrees Celsius with Fahrenheit beside them.

Only stations with at least 10 complete years are listed, and a station appears once per list.