Arizona roof facts
Arizona monsoon season by year: Phoenix rainfall and dust storms
Monsoon season runs June 15 to September 30 every year. Here is what each of the last ten seasons brought to Phoenix, from National Weather Service and NOAA records.
Arizona's monsoon season runs June 15 to September 30. Phoenix Sky Harbor averages 2.43 inches of rain in that window (1991 to 2020 normal). The last ten seasons ranged from 0.15 inches in 2023, the driest on record, to 4.20 inches in 2021. Maricopa County logged 3 to 15 dust storm days a season. Source: National Weather Service Phoenix.
TL;DR
The season is the same 108 days every year. The rain is not. Dry seasons still bring wind and dust, which is what moves tiles.
- Season dates: June 15 to September 30, set by the National Weather Service in 2008
- Normal Phoenix season rain: 2.43 inches (1991 to 2020 normal)
- Wettest of the last ten: 2021, 4.20 inches. Driest: 2023, 0.15 inches, the driest on record
- Three of the last ten seasons were under one inch at Sky Harbor, and 2020 landed at exactly one inch
- Dust storm days in Maricopa County forecast zones ran from 3 (2020) to 15 (2022)
- Most roof damage comes from the wind and dust in these storms, not the rain total
Monsoon season at Phoenix Sky Harbor, 2016 to 2025
| Year | Season rain (inches) | Dust storm days, Maricopa County |
|---|---|---|
| 2016 | 2.49 | 12 |
| 2017 | 2.32 | 10 |
| 2018 | 2.63 | 13 |
| 2019 | 0.66 | 4 |
| 2020 | 1.00 | 3 |
| 2021 | 4.20 | 7 |
| 2022 | 2.23 | 15 |
| 2023 | 0.15 | 4 |
| 2024 | 0.74 | 6 |
| 2025 | 2.76 | 6 |
| 2026 (preliminary) | 2.46 | 2 |
Rain is the official season total at Phoenix Sky Harbor Airport as reported by NWS Phoenix. Dust storm days are the distinct days with a Dust Storm event logged in Maricopa County forecast zones in the NOAA Storm Events Database.
About this dataset
The table above is a dataset. These fields describe it.
- Dataset
- Phoenix monsoon season rainfall and Maricopa County dust storm days, 2016 to 2025
- What it covers
- Official June 15 to September 30 rainfall at Phoenix Sky Harbor Airport per NWS Phoenix, and distinct dust storm event days in Maricopa County forecast zones from the NOAA Storm Events Database.
- Source
- National Weather Service Phoenix (rain); NOAA National Centers for Environmental Information (dust storms)
- Period
- 2016-06-15/2025-09-30
- Area
- Phoenix Sky Harbor Airport and Maricopa County, Arizona
- Updated
- November 5, 2026
What this means for your roof
A dry season is not a safe season. 2023 had almost no rain and still produced the August 31 dust storm and the September 12 wind event that damaged roofs across the Phoenix area.
Outflow winds lift ridge and edge tiles, and dust packs into valleys and scuppers. The first hard rain then finds every gap.
The cheapest roof repair of the year happens in May, before the season starts.
How to read the numbers
Sky Harbor is one gauge. Your street can get twice its total or almost none in the same season.
The dust storm count is the number of days NWS Phoenix logged a dust storm somewhere in Maricopa County. A 2026 preliminary row is included from NOAA daily station data. The NWS season review for 2026 was not yet published as of November 5, 2026.
Sources
- NWS Phoenix, 2025 Monsoon Season Review (season dates, Phoenix above normal): https://www.weather.gov/psr/2025MonsoonSeasonReview
- NWS Phoenix, 2023 Climate Year in Review (0.15 inches, driest monsoon on record): https://www.weather.gov/psr/yearinreview2023
- Flood Control District of Maricopa County, MSP Verification Reports quoting the official NWS Sky Harbor season totals: 2016 https://alert.fcd.maricopa.gov/alert/WY16/MSP_Verification_Report_2016.pdf ; 2017 https://alert.fcd.maricopa.gov/alert/WY17/2017_MSP_Verification_Report.pdf ; 2018 https://alert.fcd.maricopa.gov/alert/WY18/2018_MSP_Verification_Report.pdf ; 2019 https://alert.fcd.maricopa.gov/alert/WY19/2019_MSP_Verification_Report.pdf ; 2020 https://alert.fcd.maricopa.gov/alert/WY20/2020_MSP_Verification_Report.pdf ; 2021 https://alert.fcd.maricopa.gov/alert/WY21/2021_MSP_Verification_Report.pdf ; 2022 https://alert.fcd.maricopa.gov/alert/Wx/2022_MSP_Verification_Report.pdf ; 2024 https://alert.fcd.maricopa.gov/alert/Wx/2024_MSP_Verification_Report.pdf ; 2025 https://alert.fcd.maricopa.gov/alert/Wx/2025_MSP_Verification_Report.pdf
- NOAA NCEI Storm Events Database, bulk CSV files 2016 to 2026, Dust Storm events, Maricopa County zones: https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
- NOAA NCEI GHCN-Daily, station USW00023183 Phoenix Sky Harbor (cross-check and 2026 preliminary total): https://www.ncei.noaa.gov/pub/data/ghcn/daily/by_station/USW00023183.csv.gz
- Accessed November 5, 2026.
Compiled by the 10X Roofing Advantage team, Glendale, AZ, from the public sources listed below. Reviewed by {{REVIEWER}}. Published {{PUBLISHED}}. Last updated {{UPDATED}}. Data as of November 5, 2026. 10X Roofing Advantage is licensed under Arizona ROC #355299 and has roofed in Phoenix for 20 years.