Extreme Weather Events in 2017
21 extreme weather events began in 2017, with 13,442 station records set across them, from heat waves to snow events.
Data as of . Last revised (2026-10-12).
Key Facts
- 21 extreme weather events began in 2017, with 13,442 station records in total.
- Heat waves: 4.
- Cold outbreaks: 4.
- Extreme rain events: 12.
- Snow events: 1.
Events That Began in 2017
| Event | Type | Dates | Records | Stations | Top significance |
|---|---|---|---|---|---|
| Heat wave in Russia and 2 other countries, 29 December 2017 to 7 January 2018 | heat wave | 29 December 2017 to 7 January 2018 | 191 | 93 | 50 of 100 (Notable) |
| Extreme rain in Germany and 18 other countries, 27 December 2017 to 7 January 2018 | extreme rain event | 27 December 2017 to 7 January 2018 | 481 | 422 | 74 of 100 (Major) |
| Extreme rain in United States, 27 December 2017 to 2 January 2018 | extreme rain event | 27 December 2017 to 2 January 2018 | 155 | 143 | 84 of 100 (Exceptional) |
| Heat wave in Australia, 27 December 2017 to 7 January 2018 | heat wave | 27 December 2017 to 7 January 2018 | 152 | 102 | 46 of 100 (Notable) |
| Cold outbreak in United States and Mexico, 23 December 2017 to 8 January 2018 | cold outbreak | 23 December 2017 to 8 January 2018 | 8,263 | 2,186 | 61 of 100 (Major) |
| Extreme rain in Sweden and 3 other countries, 23 to 30 December 2017 | extreme rain event | 23 to 30 December 2017 | 184 | 157 | 72 of 100 (Major) |
| Extreme rain in Australia, 17 to 20 December 2017 | extreme rain event | 17 to 20 December 2017 | 168 | 120 | 74 of 100 (Major) |
| Extreme rain in Russia and 4 other countries, 16 to 23 December 2017 | extreme rain event | 16 to 23 December 2017 | 102 | 91 | 75 of 100 (Major) |
| Extreme rain in United States, 16 to 27 December 2017 | extreme rain event | 16 to 27 December 2017 | 312 | 264 | 78 of 100 (Major) |
| Extreme rain in United States, 16 to 24 December 2017 | extreme rain event | 16 to 24 December 2017 | 480 | 411 | 80 of 100 (Exceptional) |
| Heat wave in Australia, 11 to 21 December 2017 | heat wave | 11 to 21 December 2017 | 295 | 144 | 36 of 100 (Notable) |
| Cold outbreak in Japan and 5 other countries, 10 to 15 December 2017 | cold outbreak | 10 to 15 December 2017 | 112 | 84 | 29 of 100 (Routine) |
| Snow event in Netherlands and Germany, 9 to 18 December 2017 | snow event | 9 to 18 December 2017 | 226 | 140 | 58 of 100 (Notable) |
| Extreme rain in Netherlands and 18 other countries, 8 to 16 December 2017 | extreme rain event | 8 to 16 December 2017 | 304 | 250 | 68 of 100 (Major) |
| Cold outbreak in United States and Mexico, 6 to 12 December 2017 | cold outbreak | 6 to 12 December 2017 | 192 | 156 | 47 of 100 (Notable) |
| Extreme rain in Finland and 5 other countries, 5 to 13 December 2017 | extreme rain event | 5 to 13 December 2017 | 332 | 254 | 60 of 100 (Major) |
| Extreme rain in United States, 3 to 6 December 2017 | extreme rain event | 3 to 6 December 2017 | 100 | 98 | 60 of 100 (Major) |
| Extreme rain in United States and Mexico, 3 to 11 December 2017 | extreme rain event | 3 to 11 December 2017 | 215 | 189 | 72 of 100 (Major) |
| Cold outbreak in Spain and 4 other countries, 2 to 9 December 2017 | cold outbreak | 2 to 9 December 2017 | 104 | 60 | 42 of 100 (Notable) |
| Extreme rain in Australia, 2 to 6 December 2017 | extreme rain event | 2 to 6 December 2017 | 789 | 677 | 93 of 100 (Exceptional) |
| Heat wave in United States, 2 to 15 December 2017 | heat wave | 2 to 15 December 2017 | 285 | 58 | 44 of 100 (Notable) |
Records per Event
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 2026-10-12. Events are found by this site from station records and are not official designations.