Rainfall totals Flagstaff, AZ
For Flagstaff, the official rainfall for the year to date is 8.63 inches through Aug 21, 2026, according to the National Weather Service daily climate report. The normal for that date is 12.81 inches.
Data from Flagstaff Airport, with records back to 1905.
Official rainfall report for Aug 21, 2026
| Measured | Normal | |
|---|---|---|
| Rain on Aug 21, 2026 | 0.00 inches | 0.09 inches |
| Month to date | 0.51 inches | 2.14 inches |
| Year to date | 8.63 inches | 12.81 inches |
| Record for Aug 21 | 1.88 inches | 1932 |
Source: National Weather Service daily climate report for FLAGSTAFF (AMOS), issued the morning after Aug 21, 2026. The local National Weather Service office issues the daily climate report for the airport station the next morning, and that report is the official figure.
Days with measurable rain, 2026
| Date | Rainfall |
|---|---|
| Aug 11, 2026 | 0.01 inches |
| Aug 10, 2026 | 0.16 inches |
| Aug 8, 2026 | 0.01 inches |
| Aug 6, 2026 | 0.18 inches |
| Aug 5, 2026 | 0.11 inches |
| Aug 1, 2026 | 0.04 inches |
| Jul 31, 2026 | 0.04 inches |
| Jul 30, 2026 | 0.03 inches |
| Jul 28, 2026 | 0.14 inches |
| Jul 25, 2026 | 0.04 inches |
| Jul 22, 2026 | 0.01 inches |
| Jul 21, 2026 | 0.42 inches |
| Jul 20, 2026 | 0.21 inches |
| Jul 19, 2026 | 0.05 inches |
| Jul 18, 2026 | 0.62 inches |
| Jul 17, 2026 | 1.43 inches |
| Jul 16, 2026 | 0.64 inches |
| Jun 14, 2026 | 0.13 inches |
| Jun 13, 2026 | 0.01 inches |
| May 25, 2026 | 0.08 inches |
| May 5, 2026 | 0.18 inches |
| Apr 26, 2026 | 0.18 inches |
| Apr 13, 2026 | 0.25 inches |
| Apr 11, 2026 | 0.09 inches |
| Apr 6, 2026 | 0.08 inches |
| Apr 1, 2026 | 0.42 inches |
| Mar 31, 2026 | 0.02 inches |
| Mar 9, 2026 | 0.02 inches |
| Feb 20, 2026 | 0.25 inches |
| Feb 19, 2026 | 0.13 inches |
Through Aug 18, 2026, the GHCN-Daily station record shows 8.63 inches of measurable rain so far this year, falling over a 41-day span. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.
All-time rainfall records
| Wettest day | 3.93 inches | Feb 19, 1993 |
|---|---|---|
| Wettest year | 36.59 inches | 1965 |
| Driest year | 9.59 inches | 2020 |
| Average year | 20.57 inches | 91 complete years on record |
| Rain days a year | 82 | average, 0.01 inch or more |
| Record begins | 1905 | 35,143 daily readings |
Monthly rainfall normals
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inches | 2.05 | 2.17 | 1.88 | 0.89 | 0.77 | 0.30 | 2.61 | 3.04 | 1.84 | 1.52 | 1.55 | 1.90 | 20.52 |
Averages are 1991-2020 normals from NCEI.
The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.