November 2024: Weather Records and Temperatures Against Normal
November 2024 is settled: the figures use data received up to 9 November 2026, more than 45 days after the month ended, so the late station reports are in. This page compares November 2024 at weather stations worldwide with each station's own 1991 to 2020 November normal, ranks it against November of every year since 1951, and lists the weather records, events and storms of the month.
Data as of . Last revised (2026-11-09).
Key Facts
- November 2024 is settled; its data run to 9 November 2026.
- In November 2024, stations worldwide averaged +1.1 C (+1.9 F) against their 1991 to 2020 November normals, the warmest November in 74 ranked years from 1951 to 2024.
- The mean daily maximum in November 2024 was +1.1 C (+2.0 F) against normal and the mean daily minimum +1.1 C (+1.9 F).
- Among the continents in November 2024, Asia was the warmest against normal, at +1.5 C (+2.7 F), and Africa the coolest, at +0.4 C (+0.8 F).
- The station furthest above its November normal in November 2024 was Winona 5 E (United States), at +6.3 C (+11.3 F); the furthest below was Jiggs 2NE (United States), at -4.7 C (-8.5 F).
- Of the 7,944 stations with a full month of rain data in November 2024, 12% had less than half their normal November rain and 16% had at least twice their normal; the median station had 107% of its normal.
- 20,951 weather records were set or tied in November 2024, including 11,034 record highs and 1,873 record lows of maximum and minimum temperature, and 45 all-time records.
- In November 2024, 86% of the daily temperature records were record highs (6.2 to 1 highs to lows), against an average of 68% for November in 2014 to 2023.
- 24 extreme weather events detected by this site overlapped November 2024.
- 12 named storms had a best track position in November 2024; 7 peaked at 64 kt (119 km/h, 74 mph) or more and 6 at 96 kt (178 km/h, 110 mph) or more over their lifetime.
- The Oceanic Nino Index for OND 2024, the three months centred on November 2024, was -0.29: neutral, outside any El Nino or La Nina episode. NOAA's relative index (RONI) for the same season was -0.88.
- Monthly mean extent in November 2024: Arctic sea ice 9.15 million sq km (3.53 million sq mi), the 3rd lowest of 47 years for November; Antarctic sea ice 14.31 million sq km (5.53 million sq mi), the 2nd lowest of 47 years for November.
- Carbon dioxide at Mauna Loa averaged 423.85 ppm in November 2024, 3.39 ppm more than in November 2023.
Temperature Against Normal
November 2024, against 1991 to 2020| Band | Stations on the map |
|---|---|
| More than 3 C (5.4 F) below normal | 3 |
| 1 to 3 C (1.8 to 5.4 F) below normal | 194 |
| Within 1 C (1.8 F) of normal | 747 |
| 1 to 3 C (1.8 to 5.4 F) above normal | 827 |
| More than 3 C (5.4 F) above normal | 205 |
| Area | Stations | Daily maximum vs normal | Daily minimum vs normal | Mean vs normal | Rank for November (1 is warmest) |
|---|---|---|---|---|---|
| World | 6,065 | +1.1 C (+2.0 F) | +1.1 C (+1.9 F) | +1.1 C (+1.9 F) | 1st of 74 |
| Africa | 58 | +0.5 C (+0.9 F) | +0.3 C (+0.6 F) | +0.4 C (+0.8 F) | 6th of 59 |
| Asia | 211 | +1.8 C (+3.3 F) | +1.2 C (+2.2 F) | +1.5 C (+2.7 F) | 1st of 73 |
| Europe | 1,011 | n/a | n/a | n/a | n/a |
| North America | 4,387 | +0.8 C (+1.4 F) | +1.3 C (+2.3 F) | +1.1 C (+1.9 F) | 3rd of 74 |
| Oceania | 396 | +0.6 C (+1.1 F) | +1.2 C (+2.1 F) | +0.9 C (+1.6 F) | 4th of 74 |
| South America | 2 | +0.9 C (+1.7 F) | +1.2 C (+2.1 F) | +1.1 C (+1.9 F) | 1st of 28 |
Stations are averaged in 5 degree grid cells and the cells are weighted by the cosine of their latitude. A value and a rank need cells holding at least 50% of the weight of every cell that has ever had data for November; n/a means fewer stations have reported so far. The world includes Antarctica and islands without a continent row.
| Year | Mean against the 1991 to 2020 normal |
|---|---|
| 1951 | -0.7 C (-1.3 F) |
| 1952 | -2.1 C (-3.7 F) |
| 1953 | -1.3 C (-2.4 F) |
| 1954 | -0.3 C (-0.6 F) |
| 1955 | -1.2 C (-2.2 F) |
| 1956 | -1.7 C (-3.0 F) |
| 1957 | -0.6 C (-1.1 F) |
| 1958 | -0.5 C (-0.9 F) |
| 1959 | -1.0 C (-1.8 F) |
| 1960 | -1.1 C (-2.0 F) |
| 1961 | -0.6 C (-1.1 F) |
| 1962 | -0.9 C (-1.6 F) |
| 1963 | -0.1 C (-0.2 F) |
| 1964 | -0.8 C (-1.5 F) |
| 1965 | -1.2 C (-2.2 F) |
| 1966 | -0.8 C (-1.4 F) |
| 1967 | -0.5 C (-1.0 F) |
| 1968 | -1.4 C (-2.5 F) |
| 1969 | -0.7 C (-1.2 F) |
| 1970 | -0.8 C (-1.5 F) |
| 1971 | -0.3 C (-0.5 F) |
| 1972 | -1.1 C (-2.1 F) |
| 1973 | -0.6 C (-1.1 F) |
| 1974 | -1.3 C (-2.3 F) |
| 1975 | -0.9 C (-1.6 F) |
| 1976 | -1.7 C (-3.1 F) |
| 1977 | -0.1 C (-0.3 F) |
| 1978 | 0.0 C (0.0 F) |
| 1979 | -0.7 C (-1.3 F) |
| 1980 | -0.3 C (-0.6 F) |
| 1981 | -0.8 C (-1.4 F) |
| 1982 | -0.7 C (-1.2 F) |
| 1983 | 0.0 C (-0.1 F) |
| 1984 | -1.0 C (-1.7 F) |
| 1985 | -0.6 C (-1.2 F) |
| 1986 | -0.4 C (-0.8 F) |
| 1987 | -1.1 C (-2.0 F) |
| 1988 | -0.6 C (-1.0 F) |
| 1989 | -0.5 C (-1.0 F) |
| 1990 | +0.2 C (+0.3 F) |
| 1991 | -0.3 C (-0.6 F) |
| 1992 | -1.1 C (-2.0 F) |
| 1993 | -1.4 C (-2.6 F) |
| 1994 | -0.1 C (-0.2 F) |
| 1995 | +0.1 C (+0.1 F) |
| 1996 | -0.4 C (-0.8 F) |
| 1997 | -0.4 C (-0.7 F) |
| 1998 | -0.8 C (-1.5 F) |
| 1999 | -0.4 C (-0.8 F) |
| 2000 | -0.9 C (-1.7 F) |
| 2001 | +0.4 C (+0.7 F) |
| 2002 | +0.1 C (+0.1 F) |
| 2003 | -0.1 C (-0.1 F) |
| 2004 | +0.5 C (+1.0 F) |
| 2005 | +0.6 C (+1.0 F) |
| 2006 | +0.4 C (+0.8 F) |
| 2007 | +0.2 C (+0.4 F) |
| 2008 | +0.3 C (+0.5 F) |
| 2009 | 0.0 C (-0.1 F) |
| 2010 | +0.6 C (+1.0 F) |
| 2011 | -0.1 C (-0.2 F) |
| 2012 | +0.3 C (+0.6 F) |
| 2013 | +0.8 C (+1.5 F) |
| 2014 | +0.1 C (+0.2 F) |
| 2015 | +0.7 C (+1.3 F) |
| 2016 | -0.2 C (-0.3 F) |
| 2017 | +0.6 C (+1.0 F) |
| 2018 | +0.1 C (+0.2 F) |
| 2019 | +0.2 C (+0.4 F) |
| 2020 | +0.8 C (+1.5 F) |
| 2021 | +0.0 C (+0.1 F) |
| 2022 | +0.4 C (+0.6 F) |
| 2023 | +1.0 C (+1.9 F) |
| 2024 | +1.1 C (+1.9 F) |
Furthest Above Normal
| Station | Country | Mean maximum | Maximum vs normal | Mean minimum | Minimum vs normal | Mean vs normal | Years of normal |
|---|---|---|---|---|---|---|---|
| Winona 5 E | United States | 21.6 C (70.9 F) | +3.9 C (+7.0 F) | 11.7 C (53.0 F) | +8.7 C (+15.6 F) | +6.3 C (+11.3 F) | 28 |
| Fernandina Beach | United States | 28.6 C (83.5 F) | +6.5 C (+11.6 F) | 18.7 C (65.6 F) | +6.0 C (+10.8 F) | +6.2 C (+11.2 F) | 25 |
| Macon 3N | United States | 25.9 C (78.7 F) | +7.1 C (+12.7 F) | 10.1 C (50.1 F) | +5.4 C (+9.7 F) | +6.2 C (+11.2 F) | 28 |
| Waynesboro | United States | 20.5 C (69.0 F) | +4.4 C (+7.8 F) | 8.7 C (47.6 F) | +7.6 C (+13.6 F) | +6.0 C (+10.7 F) | 29 |
| Aberdeen | United States | 22.9 C (73.2 F) | +4.9 C (+8.9 F) | 11.4 C (52.6 F) | +6.9 C (+12.4 F) | +5.9 C (+10.6 F) | 28 |
| Cekunda | Russia | -4.4 C (24.2 F) | +5.4 C (+9.7 F) | -14.4 C (6.0 F) | +6.3 C (+11.3 F) | +5.8 C (+10.5 F) | 29 |
| Dauphin Is #2 | United States | 26.6 C (80.0 F) | +6.4 C (+11.5 F) | 18.4 C (65.1 F) | +5.1 C (+9.3 F) | +5.8 C (+10.4 F) | 29 |
| Columbus | United States | 23.2 C (73.8 F) | +4.7 C (+8.4 F) | 12.0 C (53.7 F) | +6.7 C (+12.1 F) | +5.7 C (+10.2 F) | 30 |
| Leland Bowman Lock | United States | 25.3 C (77.6 F) | +4.0 C (+7.1 F) | 17.5 C (63.5 F) | +7.0 C (+12.7 F) | +5.5 C (+9.9 F) | 30 |
| Baton Rouge Metro AP | United States | 26.1 C (78.9 F) | +4.4 C (+7.8 F) | 15.2 C (59.3 F) | +6.4 C (+11.6 F) | +5.4 C (+9.7 F) | 30 |
Furthest Below Normal
| Station | Country | Mean maximum | Maximum vs normal | Mean minimum | Minimum vs normal | Mean vs normal | Years of normal |
|---|---|---|---|---|---|---|---|
| Jiggs 2NE | United States | 7.8 C (46.0 F) | -1.3 C (-2.4 F) | -14.1 C (6.7 F) | -8.1 C (-14.5 F) | -4.7 C (-8.5 F) | 27 |
| Gibbs Rch - Jarbidge 24SE | United States | 5.9 C (42.6 F) | -2.7 C (-4.9 F) | -12.6 C (9.4 F) | -6.4 C (-11.5 F) | -4.5 C (-8.2 F) | 29 |
| Antero Rsvr | United States | 2.3 C (36.2 F) | -4.2 C (-7.5 F) | -16.8 C (1.8 F) | -4.0 C (-7.3 F) | -4.1 C (-7.4 F) | 30 |
| Mtn View | United States | 2.1 C (35.9 F) | -4.1 C (-7.4 F) | -9.7 C (14.5 F) | -2.8 C (-5.1 F) | -3.5 C (-6.2 F) | 28 |
| Fontenelle Dam | United States | 0.1 C (32.1 F) | -3.6 C (-6.5 F) | -15.0 C (5.0 F) | -3.3 C (-6.0 F) | -3.4 C (-6.2 F) | 30 |
| Bryce Canyon Np Hqrs | United States | 3.7 C (38.6 F) | -3.6 C (-6.4 F) | -9.8 C (14.3 F) | -3.3 C (-6.0 F) | -3.4 C (-6.2 F) | 29 |
| Monte Vista 2W | United States | 4.2 C (39.5 F) | -4.8 C (-8.7 F) | -12.4 C (9.7 F) | -1.8 C (-3.3 F) | -3.3 C (-6.0 F) | 30 |
| Hawkeye California | United States | 11.6 C (52.9 F) | -3.9 C (-7.0 F) | 6.2 C (43.1 F) | -2.8 C (-5.0 F) | -3.3 C (-6.0 F) | 28 |
| Craters of the Moon | United States | 1.8 C (35.2 F) | -3.3 C (-5.9 F) | -9.4 C (15.0 F) | -3.3 C (-5.9 F) | -3.3 C (-5.9 F) | 30 |
| Rocky Ford 2 SE | United States | 9.5 C (49.1 F) | -5.3 C (-9.6 F) | -5.5 C (22.1 F) | -0.9 C (-1.7 F) | -3.1 C (-5.7 F) | 30 |
The lists use stations with at least 25 years behind their normal. One station does not stand for the area around it.
Countries
| Country | Stations | Mean vs normal |
|---|---|---|
| Algeria | 6 | +2.9 C (+5.2 F) |
| Estonia | 16 | +2.4 C (+4.4 F) |
| Spain | 83 | +2.2 C (+4.0 F) |
| China | 146 | +1.9 C (+3.5 F) |
| Russia | 42 | +1.5 C (+2.8 F) |
| Saudi Arabia | 8 | +1.5 C (+2.6 F) |
| Finland | 122 | +1.3 C (+2.4 F) |
| Norway | 71 | +1.2 C (+2.2 F) |
| Sweden | 176 | +1.2 C (+2.1 F) |
| India | 20 | +1.1 C (+2.0 F) |
| United States | 4,358 | +1.1 C (+2.0 F) |
| France | 45 | +1.1 C (+2.0 F) |
| Australia | 388 | +1.0 C (+1.8 F) |
| Mexico | 6 | +1.0 C (+1.8 F) |
| Switzerland | 8 | +0.9 C (+1.7 F) |
| Thailand | 15 | +0.7 C (+1.3 F) |
| Puerto Rico [United States] | 13 | +0.5 C (+1.0 F) |
| United Kingdom | 52 | +0.5 C (+0.8 F) |
| Germany | 320 | +0.3 C (+0.6 F) |
| South Africa | 21 | +0.2 C (+0.4 F) |
| Netherlands | 31 | +0.1 C (+0.1 F) |
| Austria | 5 | -0.3 C (-0.5 F) |
| Turkey | 5 | -0.5 C (-1.0 F) |
| Burkina Faso | 6 | -0.9 C (-1.5 F) |
| Benin | 5 | -0.9 C (-1.6 F) |
| Niger | 8 | -1.4 C (-2.5 F) |
| Romania | 20 | -1.4 C (-2.5 F) |
Rain Against Normal
7,944 stations, November 2024| Band | Stations on the map |
|---|---|
| Under 50% of normal | 269 |
| 50 to 90% of normal | 465 |
| 90 to 110% of normal | 223 |
| 110 to 200% of normal | 514 |
| 200% or more of normal | 297 |
| Under 50% | |
|---|---|
| 50 to 90% | |
| 90 to 110% | |
| 110 to 200% | |
| 200% or more |
Of the 7,944 stations with a full month of rain data in November 2024, 12% had less than half their normal November rain and 16% had at least twice their normal; the median station had 107% of its normal. A station month needs 28 days of rain data, because a total from fewer days is too low, and a normal of at least 10 mm.
Wettest Against Normal
| Station | Country | Rain | Normal | Percent of normal | Years of normal |
|---|---|---|---|---|---|
| Campo 7 S | United States | 141.4 mm (5.6 in) | 11.1 mm (0.4 in) | 1,278% | 30 |
| Higgins | United States | 239.7 mm (9.4 in) | 19.6 mm (0.8 in) | 1,221% | 26 |
| Clovis 13 N | United States | 128.2 mm (5.0 in) | 10.7 mm (0.4 in) | 1,199% | 28 |
| Gage AP | United States | 205.9 mm (8.1 in) | 18.1 mm (0.7 in) | 1,139% | 28 |
| Richfield 10 WSW | United States | 123.0 mm (4.8 in) | 10.9 mm (0.4 in) | 1,130% | 29 |
| Walsh 1 W | United States | 165.6 mm (6.5 in) | 14.8 mm (0.6 in) | 1,116% | 30 |
| Montezuma | United States | 166.9 mm (6.6 in) | 15.5 mm (0.6 in) | 1,076% | 25 |
| Friona | United States | 200.3 mm (7.9 in) | 19.1 mm (0.8 in) | 1,046% | 30 |
| Sanford Dam | United States | 171.4 mm (6.7 in) | 17.0 mm (0.7 in) | 1,008% | 28 |
| Wasco | United States | 143.3 mm (5.6 in) | 14.5 mm (0.6 in) | 987% | 26 |
Driest Against Normal
| Station | Country | Rain | Normal | Percent of normal | Years of normal |
|---|---|---|---|---|---|
| Weipa Eastern Ave | Australia | 0.0 mm (0.00 in) | 102.0 mm (4.0 in) | 0% | 29 |
| Hamilton Island Airport | Australia | 0.0 mm (0.00 in) | 86.5 mm (3.4 in) | 0% | 26 |
| Merluna | Australia | 0.0 mm (0.00 in) | 82.9 mm (3.3 in) | 0% | 28 |
| Fig Tree | Australia | 0.0 mm (0.00 in) | 64.5 mm (2.5 in) | 0% | 28 |
| Pinnacle | Australia | 0.0 mm (0.00 in) | 61.4 mm (2.4 in) | 0% | 27 |
| Brayton (Longreach) | Australia | 0.0 mm (0.00 in) | 57.9 mm (2.3 in) | 0% | 28 |
| Melilla | Spain | 0.0 mm (0.00 in) | 48.5 mm (1.9 in) | 0% | 28 |
| Mount Carbine Township | Australia | 0.0 mm (0.00 in) | 48.2 mm (1.9 in) | 0% | 25 |
| Gilberton | Australia | 0.0 mm (0.00 in) | 48.0 mm (1.9 in) | 0% | 25 |
| Wakool (Barratta) | Australia | 0.0 mm (0.00 in) | 33.8 mm (1.3 in) | 0% | 29 |
Weather Records
20,951 set or tied in November 202420,951 weather records were set or tied in November 2024, including 11,034 record highs and 1,873 record lows of maximum and minimum temperature, and 45 all-time records.
| Record daily precipitation | |
|---|---|
| Record high minimum temperature | |
| Record high maximum temperature | |
| Record low maximum temperature | |
| Record low minimum temperature | |
| Record snow depth | |
| Record daily snowfall |
| Daily | |
|---|---|
| Monthly | |
| All-time |
November Against the Ten Years Before
| Year | Record highs, percent of highs and lows |
|---|---|
| 2014 | 41.9% |
| 2015 | 86.9% |
| 2016 | 71.3% |
| 2017 | 79.6% |
| 2018 | 51.8% |
| 2019 | 44.6% |
| 2020 | 87.4% |
| 2021 | 79.8% |
| 2022 | 57.8% |
| 2023 | 79.9% |
| 2024 | 86.1% |
In November 2024, 86% of the daily temperature records were record highs (6.2 to 1 highs to lows), against an average of 68% for November in 2014 to 2023.
The Top 10 Records of November 2024
| Date | Station | Country | Record | Value | Significance |
|---|---|---|---|---|---|
| 2024-11-05 | Salem | United States | All-time precipitation | 240.5 mm (9.5 in) | 95 of 100 (Exceptional) |
| 2024-11-09 | Pasamonte | United States | All-time snow depth | 76.2 cm (30.0 in) | 95 of 100 (Exceptional) |
| 2024-11-08 | Genoa | United States | All-time snow depth | 58.4 cm (23.0 in) | 91 of 100 (Exceptional) |
| 2024-11-03 | Edmond 5ESE | United States | Monthly precipitation | 106.2 mm (4.2 in) | 90 of 100 (Exceptional) |
| 2024-11-20 | Meda | Australia | Monthly precipitation | 96.4 mm (3.8 in) | 90 of 100 (Exceptional) |
| 2024-11-08 | Ballinger 2 NW | United States | Monthly precipitation | 144.8 mm (5.7 in) | 85 of 100 (Exceptional) |
| 2024-11-20 | Perenjori | Australia | Monthly precipitation | 72.4 mm (2.9 in) | 84 of 100 (Exceptional) |
| 2024-11-05 | Edwardsville 2 W | United States | Monthly precipitation | 159.8 mm (6.3 in) | 83 of 100 (Exceptional) |
| 2024-11-05 | Mtn Grove 2 N | United States | All-time precipitation | 249.7 mm (9.8 in) | 82 of 100 (Exceptional) |
| 2024-11-30 | Mingela Post Office | Australia | Monthly precipitation | 127.0 mm (5.0 in) | 82 of 100 (Exceptional) |
Countries With the Most Records
| Country | Records | Highs | Lows |
|---|---|---|---|
| United States | 11,250 | 5,247 | 1,420 |
| Australia | 2,777 | 949 | 110 |
| Russia | 725 | 383 | 8 |
| Germany | 626 | 373 | 15 |
| Sweden | 502 | 403 | 17 |
| Netherlands | 349 | 43 | 10 |
| Finland | 339 | 220 | 2 |
| China | 330 | 232 | 9 |
| Japan | 323 | 238 | 0 |
| Spain | 318 | 295 | 5 |
| Norway | 318 | 192 | 12 |
| United Kingdom | 281 | 208 | 39 |
| India | 198 | 181 | 11 |
| Indonesia | 148 | 143 | 5 |
| Thailand | 136 | 118 | 5 |
Events and Storms
12 named storms had a best track position in November 2024; 7 peaked at 64 kt (119 km/h, 74 mph) or more and 6 at 96 kt (178 km/h, 110 mph) or more over their lifetime.
| Storm | Basin | Lifetime peak wind | Category at peak |
|---|---|---|---|
| Fengal | North Indian | 45 kt (83 km/h, 52 mph) | Tropical storm |
| Robyn | South-West Indian | 55 kt (102 km/h, 63 mph) | Tropical storm |
| Sara | North Atlantic | 45 kt (83 km/h, 52 mph) | Tropical storm |
| Usagi | Western North Pacific | 128 kt (237 km/h, 147 mph) | Category 4 |
| Bheki | South-West Indian | 114 kt (211 km/h, 131 mph) | Category 4 |
| Man-Yi | Western North Pacific | 138 kt (256 km/h, 159 mph) | Category 5 |
| Toraji | Western North Pacific | 78 kt (144 km/h, 90 mph) | Category 1 |
| Rafael | North Atlantic | 105 kt (194 km/h, 121 mph) | Category 3 |
| Yinxing | Western North Pacific | 125 kt (232 km/h, 144 mph) | Category 4 |
| Lane | Eastern North Pacific | 40 kt (74 km/h, 46 mph) | Tropical storm |
| Patty | North Atlantic | 55 kt (102 km/h, 63 mph) | Tropical storm |
| Kong-Rey | Western North Pacific | 135 kt (250 km/h, 155 mph) | Category 4 |
November 2024 in Context
These values come from other sources and the site's own analysis pages. They are context for November 2024; this page does not say that any of them caused the temperatures or records above.
How These Numbers Are Made
Each station's mean daily maximum and minimum temperature for November 2024 is compared with its own mean for November in 1991 to 2020, from months with at least 20 days of both. A station needs 20 such years for a normal. The mean is the average of the two differences. A station month more than 15 C (27 F) from its normal in either element is treated as a data error and left out.
For the world and each continent, stations are averaged within 5 degree grid cells and the cells are averaged weighted by the cosine of their latitude, so dense networks do not outweigh sparse ones. A continent uses the stations of its own countries. A year gets a value and a rank only when its cells hold at least 50% of the weight of all the cells that have ever had data for November, the rule of the climate pages. This is a station based view: places without stations are not covered, and it is not a gridded temperature analysis.
Records are the site's public ledger: one record per observation, set or tied, at its broadest timescale. The ten year comparison uses daily temperature records only, ties excluded. The numbers and sentences on this page are generated by code from the station data; none of them is typed in by hand.
Download the Data
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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)) Source: International Best Track Archive for Climate Stewardship (IBTrACS) v04r01, NOAA National Centers for Environmental Information, doi:10.25921/82ty-9e16. Some agency values come from third parties such as JMA, IMD and BoM. (NOAA NCEI terms (citation requested)) Source: NOAA Climate Prediction Center, Oceanic Nino Index (ONI) and Relative Oceanic Nino Index (RONI). Episodes and strength classes are computed by World Extreme Weather Monitor and are not NOAA products. (US Government work, public domain (NWS disclaimer)) Source: Fetterer, F., Knowles, K., Meier, W. N., Savoie, M., Windnagel, A. K. and Stafford, T. (2025). Sea Ice Index, Version 4 (G02135). Boulder, Colorado USA. National Snow and Ice Data Center. doi:10.7265/a98x-0f50. Yearly extremes, ranks, trends and the climatology are computed by World Extreme Weather Monitor from the daily extent files and are not NSIDC products. (NSIDC data use and citation policy (public domain government funded data, citation required)) Source: NOAA Global Monitoring Laboratory, Earth System Research Laboratories (gml.noaa.gov/ccgg/trends). Mauna Loa CO2 data are from NOAA and Scripps (before 1974 the monthly values come from the Scripps Institution of Oceanography). The global means of CO2, methane and nitrous oxide are from the NOAA GML cooperative air sampling network (methane and nitrous oxide: Lan, Thoning and Dlugokencky, doi:10.15138/P8XG-AA10). (US Government open data (NOAA GML, citation requested)) Data as of 2026-11-09. Temperatures against normal, ranks and records are computed by this site from station data and are not official.