Extreme rain in United States, 30 September to 2 October 2026
Extreme rain in United States, 30 September to 2 October 2026: 7 records at 6 stations, peak on 2 October 2026. Closed.
Data as of . Last revised (2026-10-17).
Key Facts
- Extreme rain in United States, 30 September to 2 October 2026 set or tied 7 station records at 6 stations.
- It ran from 30 September 2026 to 2 October 2026 (3 days) and its peak day was 2 October 2026.
- Status: closed.
- Koloko Rsvr 1137 set a daily record precipitation of 132.6 mm (5.2 in) on 2 October 2026 (provisional).
- The busiest day was 30 September 2026 with 3 records.
- The oldest broken record in the ranked list had stood for 72 years.
Footprint
30 September to 2 October 2026| Station | Type | Value | Date |
|---|---|---|---|
| Koloko Rsvr 1137 | Record daily precipitation | 132.6 mm (5.2 in) | 2026-10-02 |
| Barking Sands | Record daily precipitation | 34.5 mm (1.4 in) | 2026-09-30 |
| Puhi 1013 | Record daily precipitation | 52.1 mm (2.1 in) | 2026-09-30 |
| Kapaka Farm 904.1 | Record daily precipitation | 39.6 mm (1.6 in) | 2026-10-02 |
| Honolulu Intl AP | Record daily precipitation | 21.3 mm (0.8 in) | 2026-09-30 |
| Mahaulepu 941.1 | Record daily precipitation | 24.9 mm (1.0 in) | 2026-10-02 |
Records per Day
Peak day 3| Date | Records |
|---|---|
| 2026-09-30 | 3 |
| 2026-10-01 | 1 |
| 2026-10-02 | 3 |
Top Records by Margin
Margin over the record replaced| Koloko Rsvr 1137, 10-02 | |
|---|---|
| Koloko Rsvr 1137, 10-01 | |
| Mahaulepu 941.1, 10-02 | |
| Barking Sands, 09-30 | |
| Kapaka Farm 904.1, 10-02 | |
| Honolulu Intl AP, 09-30 | |
| Puhi 1013, 09-30 |
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 (mm) | Years the old record stood |
|---|---|
| 40 | 57 |
| 22 | 57 |
| 5 | 72 |
| 14 | 36 |
| 1 | 65 |
| 13 | 40 |
| 17 | 8 |
Compared With Other Events
Station records per event| Extreme rain in United States and Mexico, 23 February to 15 March 2019 | |
|---|---|
| Extreme rain in United States, 3 to 19 January 2024 | |
| Extreme rain in Australia, 7 to 26 March 2021 | |
| Extreme rain in United States and Mexico, 29 September to 19 October 2018 | |
| Extreme rain in United States, 19 December 2022 to 13 January 2023 | |
| Extreme rain in United States, 30 September to 2 October 2026 (this event) |
Every Record Set
7 of 7| Date | Station | Record | Value | Margin | Years stood | Significance |
|---|---|---|---|---|---|---|
| 2026-09-30 | Barking Sands | Record daily precipitation (provisional) | 34.5 mm (1.4 in) | 14.2 mm (0.6 in) | 36 | 36 of 100 (Notable) |
| 2026-09-30 | Puhi 1013 | Record daily precipitation (provisional) | 52.1 mm (2.1 in) | 1.3 mm (0.05 in) | 65 | 29 of 100 (Routine) |
| 2026-09-30 | Honolulu Intl AP | Record daily precipitation (provisional) | 21.3 mm (0.8 in) | 5.0 mm (0.20 in) | 72 | 20 of 100 (Routine) |
| 2026-10-01 | Koloko Rsvr 1137 | Record daily precipitation (provisional) | 73.9 mm (2.9 in) | 21.8 mm (0.9 in) | 57 | 41 of 100 (Notable) |
| 2026-10-02 | Koloko Rsvr 1137 | Record daily precipitation (provisional) | 132.6 mm (5.2 in) | 40.4 mm (1.6 in) | 57 | 56 of 100 (Notable) |
| 2026-10-02 | Kapaka Farm 904.1 | Record daily precipitation (provisional) | 39.6 mm (1.6 in) | 12.7 mm (0.5 in) | 40 | 27 of 100 (Routine) |
| 2026-10-02 | Mahaulepu 941.1 | Record daily precipitation (provisional) | 24.9 mm (1.0 in) | 16.5 mm (0.6 in) | 8 | 20 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.