Cold outbreak in United States, 30 September to 4 October 2026
Cold outbreak in United States, 30 September to 4 October 2026: 24 records at 15 stations, peak on 2 October 2026. Closed.
Data as of . Last revised (2026-10-17).
Key Facts
- Cold outbreak in United States, 30 September to 4 October 2026 set or tied 24 station records at 15 stations.
- It ran from 30 September 2026 to 4 October 2026 (5 days) and its peak day was 2 October 2026.
- Status: closed.
- Wiseman set a daily record low maximum temperature of -5.0 C (23.0 F) on 3 October 2026 (provisional).
- The busiest day was 2 October 2026 with 16 records.
- The oldest broken record in the ranked list had stood for 105 years.
Footprint
30 September to 4 October 2026| Station | Type | Value | Date |
|---|---|---|---|
| Wiseman | Record low maximum temperature | -5.0 C (23.0 F) | 2026-10-03 |
| Koyukuk Nwr Alaska | Record low maximum temperature | -3.9 C (25.0 F) | 2026-09-30 |
| Upper Chena | Record low maximum temperature | -5.6 C (21.9 F) | 2026-10-02 |
| Monument Creek | Record low maximum temperature | -3.9 C (25.0 F) | 2026-10-02 |
| Munson Ridge | Record low maximum temperature | -6.7 C (19.9 F) | 2026-10-02 |
| Little Chena Ridge | Record low maximum temperature | -4.4 C (24.1 F) | 2026-10-02 |
| Selawik Alaska | Record low minimum temperature | -13.9 C (7.0 F) | 2026-10-02 |
| Kiana Alaska | Record low maximum temperature | -2.8 C (27.0 F) | 2026-10-02 |
| Mt. Ryan | Record low maximum temperature | -5.6 C (21.9 F) | 2026-10-02 |
| Caribou Peak Alaska | Record low maximum temperature | -4.4 C (24.1 F) | 2026-10-02 |
| Hogatza River Alaska | Record low minimum temperature | -13.9 C (7.0 F) | 2026-10-02 |
| Innoko Flats Alaska | Record low minimum temperature | -7.8 C (18.0 F) | 2026-10-02 |
| Poorman Alaska | Record low minimum temperature | -8.3 C (17.1 F) | 2026-10-02 |
| Round Lake Alaska | Record low minimum temperature | -10.0 C (14.0 F) | 2026-10-02 |
| Chatanika Alaska | Record low minimum temperature | -7.8 C (18.0 F) | 2026-10-03 |
Records per Day
Peak day 16| Date | Records |
|---|---|
| 2026-09-30 | 1 |
| 2026-10-01 | 3 |
| 2026-10-02 | 16 |
| 2026-10-03 | 3 |
| 2026-10-04 | 1 |
Top Records by Margin
Margin over the record replaced| Wiseman, 10-03 | |
|---|---|
| Selawik Alaska, 10-02 | |
| Koyukuk Nwr Alaska, 10-01 | |
| Caribou Peak Alaska, 10-02 | |
| Hogatza River Alaska, 10-02 | |
| Monument Creek, 10-02 | |
| Munson Ridge, 10-02 | |
| Upper Chena, 10-02 | |
| Little Chena Ridge, 10-02 | |
| Koyukuk Nwr Alaska, 10-02 | |
| Koyukuk Nwr Alaska, 09-30 | |
| Kiana Alaska, 10-02 | |
| Mt. Ryan, 10-02 | |
| Caribou Peak Alaska, 10-02 | |
| Innoko Flats Alaska, 10-02 |
Margin is how far the new value is beyond the record it replaced. Ties are not shown.
Margin Against Age of the Broken Record
| Margin (C) | Years the old record stood |
|---|---|
| 3.3 | 105 |
| 0.6 | 22 |
| 1.6 | 36 |
| 1.9 | 36 |
| 1.7 | 36 |
| 1.4 | 36 |
| 0.5 | 19 |
| 2.7 | 25 |
| 3.3 | 29 |
| 0.6 | 33 |
| 1.1 | 32 |
| 0.6 | 36 |
| 2.7 | 21 |
| 2.2 | 25 |
| 0.6 | 29 |
| 0.6 | 29 |
| 0.5 | 29 |
| 0.5 | 29 |
| 0.6 | 25 |
| 0.5 | 17 |
| 2.2 | 4 |
| 0.5 | 17 |
| 1.1 | 4 |
| 1.1 | 4 |
Compared With Other Events
Station records per event| Cold outbreak in United States and Mexico, 6 February to 5 March 2021 | |
|---|---|
| Cold outbreak in United States and Mexico, 13 October to 5 November 2020 | |
| Cold outbreak in United States and Mexico, 23 December 2017 to 8 January 2018 | |
| Cold outbreak in United States and Mexico, 3 to 23 January 2024 | |
| Cold outbreak in United States, 15 January to 10 February 2026 | |
| Cold outbreak in United States, 30 September to 4 October 2026 (this event) |
Every Record Set
30 of 24| Date | Station | Record | Value | Margin | Years stood | Significance |
|---|---|---|---|---|---|---|
| 2026-09-30 | Koyukuk Nwr Alaska | Record low maximum temperature (provisional) | -3.9 C (25.0 F) | 0.6 C (1.1 F) | 22 | 20 of 100 (Routine) |
| 2026-09-30 | Koyukuk Nwr Alaska | Record low minimum temperature (tie) (provisional) | -6.7 C (19.9 F) | tie | 24 | 2 of 100 (Routine) |
| 2026-10-01 | Koyukuk Nwr Alaska | Record low maximum temperature (provisional) | -4.4 C (24.1 F) | 2.7 C (4.9 F) | 25 | 15 of 100 (Routine) |
| 2026-10-01 | Kiana Alaska | Record low minimum temperature (provisional) | -11.1 C (12.0 F) | 0.5 C (0.9 F) | 17 | 8 of 100 (Routine) |
| 2026-10-01 | Koyukuk Nwr Alaska | Record low minimum temperature (provisional) | -9.4 C (15.1 F) | 2.2 C (4.0 F) | 4 | 8 of 100 (Routine) |
| 2026-10-01 | Round Lake Alaska | Record low maximum temperature (tie) (provisional) | 0.0 C (32.0 F) | tie | 33 | 3 of 100 (Routine) |
| 2026-10-01 | Poorman Alaska | Record low maximum temperature (tie) (provisional) | -1.7 C (28.9 F) | tie | 17 | 2 of 100 (Routine) |
| 2026-10-02 | Upper Chena | Record low maximum temperature (provisional) | -5.6 C (21.9 F) | 1.6 C (2.9 F) | 36 | 16 of 100 (Routine) |
| 2026-10-02 | Monument Creek | Record low maximum temperature (provisional) | -3.9 C (25.0 F) | 1.9 C (3.4 F) | 36 | 16 of 100 (Routine) |
| 2026-10-02 | Munson Ridge | Record low maximum temperature (provisional) | -6.7 C (19.9 F) | 1.7 C (3.1 F) | 36 | 16 of 100 (Routine) |
| 2026-10-02 | Little Chena Ridge | Record low maximum temperature (provisional) | -4.4 C (24.1 F) | 1.4 C (2.5 F) | 36 | 16 of 100 (Routine) |
| 2026-10-02 | Selawik Alaska | Record low minimum temperature (provisional) | -13.9 C (7.0 F) | 3.3 C (5.9 F) | 29 | 15 of 100 (Routine) |
| 2026-10-02 | Kiana Alaska | Record low maximum temperature (provisional) | -2.8 C (27.0 F) | 0.6 C (1.1 F) | 33 | 14 of 100 (Routine) |
| 2026-10-02 | Koyukuk Nwr Alaska | Record low maximum temperature (provisional) | -1.7 C (28.9 F) | 1.1 C (2.0 F) | 32 | 14 of 100 (Routine) |
| 2026-10-02 | Mt. Ryan | Record low maximum temperature (provisional) | -5.6 C (21.9 F) | 0.6 C (1.1 F) | 36 | 14 of 100 (Routine) |
| 2026-10-02 | Caribou Peak Alaska | Record low maximum temperature (provisional) | -4.4 C (24.1 F) | 2.7 C (4.9 F) | 21 | 13 of 100 (Routine) |
| 2026-10-02 | Hogatza River Alaska | Record low minimum temperature (provisional) | -13.9 C (7.0 F) | 2.2 C (4.0 F) | 25 | 13 of 100 (Routine) |
| 2026-10-02 | Caribou Peak Alaska | Record low minimum temperature (provisional) | -7.8 C (18.0 F) | 0.6 C (1.1 F) | 29 | 12 of 100 (Routine) |
| 2026-10-02 | Innoko Flats Alaska | Record low minimum temperature (provisional) | -7.8 C (18.0 F) | 0.6 C (1.1 F) | 29 | 12 of 100 (Routine) |
| 2026-10-02 | Kiana Alaska | Record low minimum temperature (provisional) | -13.3 C (8.1 F) | 0.5 C (0.9 F) | 29 | 11 of 100 (Routine) |
| 2026-10-02 | Poorman Alaska | Record low minimum temperature (provisional) | -8.3 C (17.1 F) | 0.5 C (0.9 F) | 29 | 11 of 100 (Routine) |
| 2026-10-02 | Round Lake Alaska | Record low minimum temperature (provisional) | -10.0 C (14.0 F) | 0.6 C (1.1 F) | 25 | 10 of 100 (Routine) |
| 2026-10-02 | Hogatza River Alaska | Record low maximum temperature (tie) (provisional) | 1.1 C (34.0 F) | tie | 27 | 2 of 100 (Routine) |
| 2026-10-03 | Wiseman | Record low maximum temperature (provisional) | -5.0 C (23.0 F) | 3.3 C (5.9 F) | 105 | 45 of 100 (Notable) |
| 2026-10-03 | Koyukuk Nwr Alaska | Record low minimum temperature (provisional) | -8.3 C (17.1 F) | 0.5 C (0.9 F) | 17 | 8 of 100 (Routine) |
| 2026-10-03 | Poorman Alaska | Record low minimum temperature (provisional) | -10.0 C (14.0 F) | 1.1 C (2.0 F) | 4 | 5 of 100 (Routine) |
| 2026-10-03 | Chatanika Alaska | Record low minimum temperature (tie) (provisional) | -7.8 C (18.0 F) | tie | 36 | 3 of 100 (Routine) |
| 2026-10-03 | Caribou Peak Alaska | Record low minimum temperature (tie) (provisional) | -10.0 C (14.0 F) | tie | 29 | 2 of 100 (Routine) |
| 2026-10-03 | Little Chena Ridge | Record low minimum temperature (tie) (provisional) | -9.4 C (15.1 F) | tie | 19 | 2 of 100 (Routine) |
| 2026-10-04 | Wiseman | Record low maximum temperature (provisional) | -3.3 C (26.1 F) | 0.5 C (0.9 F) | 19 | 15 of 100 (Routine) |
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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)) Data as of 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.