July is one of the warmer months of the year in Flagstaff, with average highs near 30.5°C and lows around 15.6°C (mean 23.1°C). It is a relatively wet time of year, averaging 60 mm of rainfall and 44% relative humidity across the period.
July is one of the warmer months of the year in Flagstaff. Across 45 years of records, the warmest July in Flagstaff was 2023 — when the month averaged 26.2°C — while the coldest was 1993 at 20.6°C. Typical July days reach 30.5°C with nights near 15.6°C. The long-term trend is warming, about 0.6°C per decade.
July is a relatively wet time of year in Flagstaff, averaging 60 mm of rainfall. The wettest July on record was 2021 with 127 mm, while the driest was 1993 at 5 mm.
Relative humidity in Flagstaff during July averages 44%. The most humid July was 1984 at 57%, and the least humid was 2000 at 31%.
July receives about 7 kWh/m²/day of solar energy in Flagstaff. The sunniest July was 1993 at 8.2 kWh/m²/day, and the cloudiest were 1984, 1999 and 2021 at 6.3.
Average wind speed in Flagstaff during July is 2 m/s. The windiest July was 1993 at 3.1 m/s, while the calmest were 2007, 2008 and 2022, among others at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.1°C | 22.3°C | 23.7°C | 23.1°C | 24.7°C | +2.6°C |
| Avg High | 29.4°C | 30.0°C | 31.4°C | 30.2°C | 32.4°C | +3°C |
| Avg Low | 14.9°C | 14.7°C | 16.1°C | 16.0°C | 17.0°C | +2.1°C |
| Avg Rain | 65 mm | 51 mm | 51 mm | 74 mm | 57 mm | -8 mm |
July temperatures in Flagstaff have risen by about 2.6°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8.2°C (1987) to a record high of 38.9°C (2021).
Rainfall in July is a relatively wet time of year, averaging 60 mm, with a wettest year of 127 mm.
One of the best times to visit Flagstaff
July is one of the best times to visit Flagstaff. Expect days averaging 30.5°C and nights around 15.6°C (mean 23.1°C) — warmer than Flagstaff's yearly average — with moderate rainfall (60 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.1°C | 24.0°C | 15.9°C | 36.9°C | 12.3°C | 33 mm | 35% | 2.2 m/s | 7.3 |
| 2024 | 34.2°C | 25.9°C | 17.6°C | 37.4°C | 14.4°C | 31 mm | 36% | 2 m/s | 7.7 |
| 2023 🔥 | 34.5°C | 26.2°C | 17.8°C | 37.2°C | 13.1°C | 22 mm | 33% | 2.2 m/s | 7.6 |
| 2022 | 31.1°C | 24.1°C | 17.1°C | 35.6°C | 12.6°C | 102 mm | 49% | 1.7 m/s | 6.6 |
| 2021 🌧️ | 30.6°C | 23.9°C | 17.3°C | 38.9°C | 14.3°C | 127 mm | 53% | 1.8 m/s | 6.3 |
| 2020 | 32.0°C | 24.2°C | 16.4°C | 37.3°C | 11.1°C | 26 mm | 38% | 1.9 m/s | 7.1 |
| 2019 | 31.3°C | 23.6°C | 15.9°C | 34.7°C | 11.3°C | 27 mm | 37% | 2.2 m/s | 7.3 |
| 2018 | 31.6°C | 24.4°C | 17.2°C | 35.9°C | 13.1°C | 83 mm | 47% | 1.8 m/s | 6.7 |
| 2017 | 29.8°C | 23.2°C | 16.7°C | 36.6°C | 14.3°C | 81 mm | 51% | 1.8 m/s | 6.7 |
| 2016 | 30.7°C | 23.2°C | 15.8°C | 36.1°C | 12.4°C | 59 mm | 42% | 2.2 m/s | 7.3 |
| 2015 | 28.2°C | 21.3°C | 14.5°C | 31.6°C | 10.3°C | 75 mm | 52% | 2.1 m/s | 6.9 |
| 2014 | 29.9°C | 22.9°C | 16.0°C | 34.0°C | 14.1°C | 62 mm | 49% | 1.8 m/s | 6.4 |
| 2013 | 29.9°C | 23.1°C | 16.4°C | 35.4°C | 13.4°C | 96 mm | 53% | 1.8 m/s | 6.4 |
| 2012 | 29.4°C | 22.6°C | 15.8°C | 33.8°C | 12.9°C | 105 mm | 51% | 1.8 m/s | 6.4 |
| 2011 | 30.7°C | 23.3°C | 15.9°C | 35.9°C | 10.0°C | 60 mm | 43% | 1.9 m/s | 6.8 |
| 2010 | 30.0°C | 23.1°C | 16.2°C | 35.3°C | 10.0°C | 87 mm | 50% | 1.9 m/s | 6.5 |
| 2009 | 31.6°C | 24.0°C | 16.3°C | 35.7°C | 14.1°C | 35 mm | 42% | 2.1 m/s | 7 |
| 2008 | 29.8°C | 22.7°C | 15.7°C | 34.8°C | 13.7°C | 68 mm | 49% | 1.7 m/s | 6.8 |
| 2007 | 31.5°C | 23.8°C | 16.1°C | 37.4°C | 13.5°C | 96 mm | 44% | 1.7 m/s | 6.7 |
| 2006 | 30.6°C | 23.7°C | 16.8°C | 35.6°C | 12.7°C | 73 mm | 49% | 1.9 m/s | 6.6 |
| 2005 | 32.3°C | 23.9°C | 15.6°C | 37.0°C | 12.3°C | 51 mm | 37% | 2.1 m/s | 7.7 |
| 2004 | 31.2°C | 23.3°C | 15.3°C | 33.9°C | 9.3°C | 45 mm | 37% | 1.9 m/s | 7.3 |
| 2003 | 33.4°C | 25.2°C | 17.1°C | 37.8°C | 14.2°C | 37 mm | 33% | 2 m/s | 7.3 |
| 2002 | 31.8°C | 24.4°C | 17.1°C | 37.3°C | 14.1°C | 40 mm | 37% | 2.2 m/s | 6.9 |
| 2001 | 29.7°C | 22.6°C | 15.5°C | 34.9°C | 10.6°C | 55 mm | 43% | 2.2 m/s | 6.8 |
| 2000 | 32.0°C | 23.6°C | 15.3°C | 36.1°C | 10.5°C | 12 mm | 31% | 2.3 m/s | 7.5 |
| 1999 | 28.2°C | 21.6°C | 15.0°C | 35.4°C | 12.6°C | 105 mm | 55% | 2 m/s | 6.3 |
| 1998 | 30.8°C | 23.1°C | 15.5°C | 35.9°C | 12.6°C | 75 mm | 47% | 2.1 m/s | 7.5 |
| 1997 | 30.9°C | 22.4°C | 13.9°C | 36.2°C | 9.7°C | 21 mm | 32% | 2 m/s | 7.6 |
| 1996 | 31.1°C | 23.9°C | 16.7°C | 35.8°C | 14.1°C | 69 mm | 45% | 1.7 m/s | 6.5 |
| 1995 | 30.8°C | 22.5°C | 14.2°C | 36.4°C | 9.9°C | 17 mm | 36% | 2 m/s | 7.3 |
| 1994 | 31.1°C | 23.1°C | 15.1°C | 34.5°C | 10.6°C | 27 mm | 37% | 2.3 m/s | 7.2 |
| 1993 ❄️ | 28.7°C | 20.6°C | 12.5°C | 32.6°C | 9.5°C | 5 mm | 41% | 3.1 m/s | 8.2 |
| 1992 | 28.0°C | 20.8°C | 13.7°C | 32.6°C | 8.2°C | 75 mm | 49% | 2.3 m/s | 7 |
| 1991 | 30.5°C | 22.7°C | 15.0°C | 34.0°C | 11.9°C | 41 mm | 40% | 2.1 m/s | 6.9 |
| 1990 | 29.7°C | 22.6°C | 15.5°C | 36.0°C | 11.8°C | 78 mm | 49% | 2.1 m/s | 6.9 |
| 1989 | 30.7°C | 23.2°C | 15.7°C | 36.9°C | 13.0°C | 67 mm | 42% | 2.1 m/s | 7.3 |
| 1988 | 30.3°C | 23.0°C | 15.7°C | 34.6°C | 13.1°C | 49 mm | 46% | 2 m/s | 6.7 |
| 1987 | 29.1°C | 20.9°C | 12.8°C | 33.3°C | 8.2°C | 35 mm | 39% | 2.6 m/s | 7.3 |
| 1986 | 28.0°C | 20.9°C | 13.8°C | 34.1°C | 11.2°C | 85 mm | 49% | 2.2 m/s | 7.2 |
| 1985 | 30.3°C | 22.9°C | 15.5°C | 36.4°C | 12.3°C | 71 mm | 47% | 1.8 m/s | 6.7 |
| 1984 | 28.0°C | 21.8°C | 15.7°C | 34.3°C | 13.6°C | 83 mm | 57% | 1.8 m/s | 6.3 |
| 1983 | 28.5°C | 21.4°C | 14.3°C | 33.7°C | 9.9°C | 69 mm | 50% | 2.2 m/s | — |
| 1982 | 29.0°C | 21.6°C | 14.2°C | 33.5°C | 8.9°C | 55 mm | 44% | 2.3 m/s | — |
| 1981 | 30.5°C | 23.3°C | 16.1°C | 35.8°C | 12.9°C | 71 mm | 46% | 2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 30.5°C with lows near 15.6°C (mean 23.1°C), based on 45 years of NASA POWER data.
July averages 60 mm of rainfall in Flagstaff, a relatively wet time of year. The wettest on record was 127 mm in 2021.
The hottest July reached 38.9°C in 2021. The coldest dipped to 8.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.6°C. Daytime highs moved from 29.3°C to 32.5°C and overnight lows from 15.2°C to 17.1°C over the same span.
July is one of the warmer months of the year in Flagstaff and a relatively wet time of year, so plan for around 30.5°C daytime highs and 15.6°C at night.
Not quite — July is the 12th coolest month in Flagstaff, averaging 23.1°C.
For July in Flagstaff, pack light, breathable clothing and sun protection, with typical highs of 30.5°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 44% — relatively dry.
Average wind speed in July is 2 m/s. The windiest July on record averaged 3.1 m/s (1993).
The wettest July on record was 2021 with 127 mm. On average, July sees 60 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Flagstaff behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
