October is one of the warmer months of the year in Flagstaff, with average highs near 19.8°C and lows around 4.9°C (mean 12.4°C). It is about average for rainfall, averaging 33 mm of rainfall and 48% relative humidity across the period.
October is one of the warmer months of the year in Flagstaff. Across 45 years of records, the warmest October in Flagstaff was 2024 — when the month averaged 16.5°C — while the coldest was 1984 at 8.3°C. Typical October days reach 19.8°C with nights near 4.9°C. The long-term trend is warming, about 0.6°C per decade.
October is about average for rainfall in Flagstaff, averaging 33 mm of rainfall. The wettest October on record was 2000 with 106 mm, while the driest was 1999 at 0 mm.
Relative humidity in Flagstaff during October averages 48%. The most humid October was 2018 at 67%, and the least humid was 2020 at 27%.
October receives about 4.8 kWh/m²/day of solar energy in Flagstaff. The sunniest October was 2019 at 5.4 kWh/m²/day, and the cloudiest was 2018 at 3.9.
Average wind speed in Flagstaff during October is 2.1 m/s. The windiest Octobers were 1981 and 2004 at 2.7 m/s, while the calmest was 1988 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.4°C | 12.1°C | 12.2°C | 12.7°C | 14.1°C | +2.7°C |
| Avg High | 18.6°C | 19.8°C | 19.6°C | 20.1°C | 21.7°C | +3.1°C |
| Avg Low | 4.1°C | 4.4°C | 4.9°C | 5.2°C | 6.5°C | +2.4°C |
| Avg Rain | 41 mm | 28 mm | 32 mm | 32 mm | 35 mm | -6 mm |
October temperatures in Flagstaff have risen by about 3.5°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -8.9°C (1991) to a record high of 31.4°C (2024).
Rainfall in October is about average for rainfall, averaging 33 mm, with a wettest year of 106 mm.
A good time to visit Flagstaff
October is a good time to visit Flagstaff, with days averaging 19.8°C and nights around 4.9°C (mean 12.4°C, close to Flagstaff's yearly average) and moderate rainfall. June and August are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.9°C | 14.3°C | 6.6°C | 27.6°C | 0.4°C | 75 mm | 49% | 2.2 m/s | 4.9 |
| 2024 🔥 | 24.2°C | 16.5°C | 8.8°C | 31.4°C | -2.2°C | 43 mm | 37% | 1.9 m/s | 4.7 |
| 2023 | 21.9°C | 14.2°C | 6.5°C | 28.4°C | -5.7°C | 7 mm | 43% | 2 m/s | 5.1 |
| 2022 | 18.9°C | 12.2°C | 5.5°C | 26.1°C | -4.8°C | 48 mm | 56% | 1.9 m/s | 4.7 |
| 2021 | 19.1°C | 11.7°C | 4.3°C | 24.9°C | -2.5°C | 31 mm | 50% | 2.4 m/s | 4.8 |
| 2020 | 24.0°C | 15.5°C | 7.0°C | 30.0°C | -8.4°C | 3 mm | 27% | 2 m/s | 5.2 |
| 2019 | 18.9°C | 10.7°C | 2.5°C | 26.4°C | -8.6°C | 1 mm | 33% | 2.5 m/s | 5.4 |
| 2018 | 17.4°C | 11.1°C | 4.9°C | 25.1°C | -2.3°C | 101 mm | 67% | 2.1 m/s | 3.9 |
| 2017 | 21.9°C | 13.6°C | 5.3°C | 26.5°C | -2.2°C | 1 mm | 36% | 2.4 m/s | 5.2 |
| 2016 | 22.3°C | 14.7°C | 7.2°C | 25.8°C | 0.2°C | 11 mm | 48% | 2.4 m/s | 4.8 |
| 2015 | 19.9°C | 13.5°C | 7.1°C | 28.1°C | 0.0°C | 84 mm | 60% | 1.9 m/s | 4.3 |
| 2014 | 21.9°C | 14.3°C | 6.6°C | 25.5°C | 0.7°C | 12 mm | 48% | 1.7 m/s | 4.8 |
| 2013 | 17.7°C | 9.9°C | 2.2°C | 24.8°C | -3.5°C | 12 mm | 45% | 2.4 m/s | 5.1 |
| 2012 | 21.3°C | 13.5°C | 5.6°C | 28.5°C | -3.6°C | 13 mm | 40% | 2.2 m/s | 5.1 |
| 2011 | 20.1°C | 12.4°C | 4.8°C | 27.9°C | -3.0°C | 36 mm | 44% | 2 m/s | 4.8 |
| 2010 | 19.8°C | 12.9°C | 5.9°C | 30.0°C | -3.6°C | 49 mm | 57% | 2.1 m/s | 4.4 |
| 2009 | 17.6°C | 10.1°C | 2.6°C | 26.5°C | -6.7°C | 3 mm | 42% | 2.6 m/s | 4.9 |
| 2008 | 20.2°C | 12.4°C | 4.6°C | 26.4°C | -5.7°C | 6 mm | 38% | 2.2 m/s | 5.1 |
| 2007 | 20.1°C | 12.2°C | 4.4°C | 25.6°C | -4.1°C | 5 mm | 43% | 2.6 m/s | 5 |
| 2006 | 17.8°C | 10.6°C | 3.4°C | 26.3°C | -3.6°C | 51 mm | 55% | 2.2 m/s | 4.5 |
| 2005 | 20.0°C | 12.5°C | 5.1°C | 26.1°C | -0.9°C | 28 mm | 53% | 2.1 m/s | 4.7 |
| 2004 | 18.1°C | 11.3°C | 4.4°C | 25.6°C | -2.8°C | 66 mm | 55% | 2.7 m/s | 4.5 |
| 2003 | 23.3°C | 15.6°C | 8.0°C | 30.4°C | -2.3°C | 9 mm | 39% | 2.1 m/s | 4.9 |
| 2002 | 18.5°C | 11.5°C | 4.5°C | 24.9°C | -0.9°C | 30 mm | 50% | 1.9 m/s | 4.6 |
| 2001 | 22.1°C | 14.3°C | 6.6°C | 26.9°C | 0.7°C | 13 mm | 40% | 2 m/s | 4.6 |
| 2000 🌧️ | 18.3°C | 11.6°C | 4.9°C | 29.7°C | -3.3°C | 106 mm | 59% | 2.3 m/s | 4.3 |
| 1999 | 21.9°C | 13.6°C | 5.3°C | 26.9°C | -3.7°C | 0 mm | 34% | 1.9 m/s | 5.3 |
| 1998 | 19.1°C | 11.5°C | 3.8°C | 26.9°C | -4.0°C | 54 mm | 50% | 2.4 m/s | 4.6 |
| 1997 | 18.6°C | 10.8°C | 3.0°C | 28.1°C | -6.3°C | 31 mm | 48% | 2.3 m/s | 4.9 |
| 1996 | 18.6°C | 11.2°C | 3.8°C | 29.2°C | -7.4°C | 21 mm | 46% | 2.3 m/s | 4.7 |
| 1995 | 21.3°C | 13.0°C | 4.6°C | 26.5°C | -5.3°C | 3 mm | 37% | 1.9 m/s | 5.1 |
| 1994 | 18.6°C | 11.0°C | 3.4°C | 23.0°C | -3.8°C | 47 mm | 47% | 2 m/s | 4.8 |
| 1993 | 18.3°C | 11.2°C | 4.1°C | 27.4°C | -6.0°C | 59 mm | 52% | 1.9 m/s | 4.5 |
| 1992 | 20.4°C | 13.4°C | 6.3°C | 25.1°C | 0.0°C | 38 mm | 49% | 1.9 m/s | 4.6 |
| 1991 | 20.5°C | 13.0°C | 5.6°C | 27.3°C | -8.9°C | 21 mm | 41% | 2.2 m/s | 4.9 |
| 1990 | 20.4°C | 12.2°C | 4.0°C | 25.5°C | -4.9°C | 8 mm | 44% | 2.1 m/s | 4.9 |
| 1989 | 19.3°C | 11.8°C | 4.4°C | 26.5°C | -6.5°C | 27 mm | 45% | 2.1 m/s | 4.8 |
| 1988 | 22.3°C | 14.9°C | 7.4°C | 27.1°C | 4.4°C | 23 mm | 48% | 1.6 m/s | 4.6 |
| 1987 | 20.8°C | 14.0°C | 7.2°C | 28.6°C | 2.9°C | 95 mm | 52% | 1.8 m/s | 4.5 |
| 1986 | 17.1°C | 9.8°C | 2.4°C | 21.9°C | -5.0°C | 56 mm | 56% | 1.9 m/s | 4.4 |
| 1985 | 18.7°C | 11.8°C | 4.8°C | 25.8°C | -1.8°C | 47 mm | 58% | 2 m/s | 4.4 |
| 1984 ❄️ | 15.2°C | 8.3°C | 1.4°C | 22.4°C | -6.5°C | 39 mm | 59% | 2.3 m/s | 4.3 |
| 1983 | 18.8°C | 12.1°C | 5.3°C | 22.9°C | 1.4°C | 25 mm | 65% | 1.9 m/s | — |
| 1982 | 17.7°C | 9.6°C | 1.6°C | 23.9°C | -5.4°C | 10 mm | 42% | 2.2 m/s | — |
| 1981 | 17.2°C | 9.9°C | 2.7°C | 22.6°C | -5.8°C | 47 mm | 52% | 2.7 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 19.8°C with lows near 4.9°C (mean 12.4°C), based on 45 years of NASA POWER data.
October averages 33 mm of rainfall in Flagstaff, about average for rainfall. The wettest on record was 106 mm in 2000.
The hottest October reached 31.4°C in 2024. The coldest dipped to -8.9°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 3.5°C. Daytime highs moved from 17.5°C to 21.2°C and overnight lows from 3.2°C to 6.3°C over the same span.
October is one of the warmer months of the year in Flagstaff and about average for rainfall, so plan for around 19.8°C daytime highs and 4.9°C at night.
Not quite — October is the 7th coolest month in Flagstaff, averaging 12.4°C.
For October in Flagstaff, pack warm layers and a jacket for chilly mornings, with typical highs of 19.8°C and lows of 4.9°C.
Relative humidity in October averages 48% — relatively dry.
Average wind speed in October is 2.1 m/s. The windiest October on record averaged 2.7 m/s (1981).
The wettest October on record was 2000 with 106 mm. On average, October sees 33 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
