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Rainfall Totals Last 24 Hours in Boulder, CO
Last Rain · 24 Hours · 72 Hours · 7 Days · 30 Days
This Month · This Year
How much rain did Boulder, CO get?
| Last RainAugust 31, 2026 | 24 Hours | 72 Hours | 7 Days | 30 Days | This Month | This Year |
|---|---|---|---|---|---|---|
| 0.05″ | 0.00″ | 0.00″ | 0.14″ | 1.16″ | 0.00″ | 8.97″ |
Precipitation by month
Wettest month
3.47″
May 2026
Driest month
0.00″
September 2026
Longest dry streak
18 days
ended Feb 12
Most rain in 24 hours
1.19″
Sep 23
| Month | Rain | Normal | % of normal | Rainy days |
|---|---|---|---|---|
| October 2025 | 1.82″ | 1.62″ | 112% | 17 |
| November 2025 | 0.52″ | 1.18″ | 44% | 9 |
| December 2025 | 1.54″ | 0.81″ | 190% | 13 |
| January 2026 | 0.26″ | 0.83″ | 31% | 4 |
| February 2026 | 0.14″ | 0.99″ | 14% | 3 |
| March 2026 | 1.01″ | 1.99″ | 51% | 5 |
| April 2026 | 0.63″ | 3.05″ | 21% | 8 |
| May 2026 | 3.47″ | 3.21″ | 108% | 12 |
| June 2026 | 1.22″ | 1.95″ | 63% | 4 |
| July 2026 | 0.89″ | 1.83″ | 49% | 12 |
| August 2026 | 1.35″ | 1.68″ | 80% | 14 |
| September 2026 | 0.00″ | 2.09″ | 0% | 0 |