March is one of the cooler months of the year in Flagstaff, with average highs near 13.3°C and lows around -1.2°C (mean 6.1°C). It is about average for rainfall, averaging 46 mm of rainfall and 54% relative humidity across the period.
March is one of the cooler months of the year in Flagstaff. Across 45 years of records, the warmest March in Flagstaff was 2004 — when the month averaged 10.2°C — while the coldest was 1991 at 2.5°C. Typical March days reach 13.3°C with nights near -1.2°C. The long-term trend is warming, about 0.4°C per decade.
March is about average for rainfall in Flagstaff, averaging 46 mm of rainfall. The wettest March on record was 1991 with 143 mm, while the driest were 1988 and 2009 at 3 mm.
Relative humidity in Flagstaff during March averages 54%. The most humid March was 1983 at 70%, and the least humid was 2002 at 34%.
March receives about 5.6 kWh/m²/day of solar energy in Flagstaff. The sunniest Marchs were 1997 and 2008 at 6.3 kWh/m²/day, and the cloudiest was 1992 at 4.9.
Average wind speed in Flagstaff during March is 2.7 m/s. The windiest March was 2023 at 3.4 m/s, while the calmest were 2001 and 2004 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.2°C | 5.8°C | 6.3°C | 7.2°C | 5.5°C | +0.3°C |
| Avg High | 12.3°C | 13.0°C | 13.7°C | 14.8°C | 12.3°C | 0°C |
| Avg Low | -1.9°C | -1.5°C | -1.1°C | -0.5°C | -1.3°C | +0.6°C |
| Avg Rain | 57 mm | 60 mm | 29 mm | 27 mm | 68 mm | +10 mm |
March temperatures in Flagstaff have risen by about 0.7°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -14.4°C (1997) to a record high of 25.6°C (2004).
Rainfall in March is about average for rainfall, averaging 46 mm, with a wettest year of 143 mm.
A quieter season to visit Flagstaff
If your dates are flexible, the more temperate months of June and August tend to be the most comfortable for visiting Flagstaff. That said, March — with days averaging 13.3°C and nights around -1.2°C (mean 6.1°C) and moderate rainfall (46 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.2°C | 7.1°C | -0.1°C | 24.4°C | -7.4°C | 47 mm | 49% | 3.2 m/s | 5.4 |
| 2024 | 11.6°C | 5.2°C | -1.1°C | 18.1°C | -5.1°C | 84 mm | 63% | 3 m/s | 5.2 |
| 2023 | 9.3°C | 3.4°C | -2.5°C | 15.3°C | -10.1°C | 123 mm | 67% | 3.4 m/s | 5 |
| 2022 | 13.6°C | 6.3°C | -1.0°C | 25.1°C | -8.7°C | 31 mm | 45% | 2.8 m/s | 5.7 |
| 2021 | 12.2°C | 4.9°C | -2.4°C | 20.5°C | -7.5°C | 42 mm | 50% | 3.1 m/s | 5.6 |
| 2020 | 13.0°C | 6.1°C | -0.7°C | 21.1°C | -5.7°C | 77 mm | 64% | 2.9 m/s | 5.4 |
| 2019 | 13.5°C | 6.3°C | -0.9°C | 20.9°C | -8.8°C | 52 mm | 61% | 2.9 m/s | 5.5 |
| 2018 | 14.4°C | 6.9°C | -0.6°C | 23.5°C | -6.6°C | 14 mm | 46% | 2.7 m/s | 5.6 |
| 2017 | 16.2°C | 8.9°C | 1.6°C | 23.4°C | -9.6°C | 20 mm | 53% | 2.5 m/s | 5.7 |
| 2016 | 15.7°C | 7.7°C | -0.2°C | 21.8°C | -4.4°C | 7 mm | 44% | 2.8 m/s | 6 |
| 2015 | 16.3°C | 8.7°C | 1.2°C | 24.1°C | -6.0°C | 47 mm | 51% | 2.2 m/s | 5.7 |
| 2014 | 14.9°C | 7.0°C | -0.8°C | 20.1°C | -5.3°C | 34 mm | 46% | 2.6 m/s | 5.8 |
| 2013 | 15.5°C | 7.7°C | -0.1°C | 22.6°C | -6.0°C | 29 mm | 45% | 2.5 m/s | 5.7 |
| 2012 | 14.3°C | 6.5°C | -1.4°C | 22.5°C | -10.5°C | 19 mm | 43% | 3.1 m/s | 6.1 |
| 2011 | 15.0°C | 7.2°C | -0.7°C | 20.5°C | -5.6°C | 13 mm | 48% | 3.1 m/s | 5.7 |
| 2010 | 12.1°C | 4.6°C | -2.9°C | 21.3°C | -10.2°C | 35 mm | 57% | 2.8 m/s | 5.8 |
| 2009 | 14.6°C | 6.8°C | -1.0°C | 23.0°C | -6.6°C | 3 mm | 43% | 2.9 m/s | 6.1 |
| 2008 | 13.2°C | 5.6°C | -2.1°C | 20.2°C | -7.6°C | 3 mm | 49% | 2.9 m/s | 6.3 |
| 2007 | 15.8°C | 8.1°C | 0.5°C | 25.5°C | -7.6°C | 20 mm | 46% | 2.3 m/s | 5.8 |
| 2006 | 11.0°C | 4.1°C | -2.7°C | 18.8°C | -12.7°C | 42 mm | 55% | 3.2 m/s | 5 |
| 2005 | 11.3°C | 4.9°C | -1.6°C | 19.1°C | -6.5°C | 37 mm | 63% | 2.7 m/s | 5.4 |
| 2004 🔥 | 18.2°C | 10.2°C | 2.2°C | 25.6°C | -5.9°C | 12 mm | 46% | 2.1 m/s | 6 |
| 2003 | 12.8°C | 5.6°C | -1.7°C | 21.5°C | -9.4°C | 42 mm | 53% | 2.5 m/s | 5.4 |
| 2002 | 13.4°C | 5.6°C | -2.3°C | 23.0°C | -8.9°C | 11 mm | 34% | 2.8 m/s | 6 |
| 2001 | 14.6°C | 7.2°C | -0.1°C | 22.6°C | -5.6°C | 29 mm | 52% | 2.1 m/s | 5.5 |
| 2000 | 12.3°C | 5.0°C | -2.2°C | 19.7°C | -7.2°C | 92 mm | 57% | 2.4 m/s | 5.1 |
| 1999 | 15.5°C | 7.3°C | -0.8°C | 22.1°C | -4.9°C | 10 mm | 46% | 2.9 m/s | 6 |
| 1998 | 11.4°C | 4.4°C | -2.6°C | 22.0°C | -10.4°C | 96 mm | 63% | 2.8 m/s | 5.6 |
| 1997 | 16.3°C | 7.8°C | -0.8°C | 24.1°C | -14.4°C | 4 mm | 42% | 2.4 m/s | 6.3 |
| 1996 | 13.5°C | 5.8°C | -1.9°C | 21.0°C | -7.9°C | 17 mm | 45% | 2.8 m/s | 5.7 |
| 1995 | 12.7°C | 5.9°C | -1.0°C | 20.0°C | -6.6°C | 83 mm | 62% | 2.9 m/s | 5.3 |
| 1994 | 14.1°C | 6.6°C | -0.9°C | 19.9°C | -5.6°C | 49 mm | 57% | 2.5 m/s | 5.2 |
| 1993 | 13.0°C | 5.9°C | -1.2°C | 19.5°C | -7.0°C | 48 mm | 66% | 2.2 m/s | 5.3 |
| 1992 | 11.6°C | 5.3°C | -1.0°C | 17.5°C | -6.3°C | 102 mm | 69% | 2.4 m/s | 4.9 |
| 1991 ❄️ 🌧️ | 9.0°C | 2.5°C | -4.1°C | 17.2°C | -7.8°C | 143 mm | 64% | 3.3 m/s | 5 |
| 1990 | 13.1°C | 6.1°C | -0.9°C | 22.6°C | -14.3°C | 47 mm | 55% | 2.6 m/s | 5.1 |
| 1989 | 15.9°C | 8.0°C | 0.1°C | 23.6°C | -10.4°C | 52 mm | 47% | 3 m/s | 5.6 |
| 1988 | 12.6°C | 4.9°C | -2.9°C | 23.0°C | -7.2°C | 3 mm | 49% | 2.6 m/s | 6 |
| 1987 | 9.8°C | 3.1°C | -3.7°C | 18.4°C | -10.3°C | 51 mm | 60% | 2.6 m/s | 5.4 |
| 1986 | 14.2°C | 7.3°C | 0.4°C | 23.0°C | -8.0°C | 80 mm | 59% | 2.4 m/s | 5.2 |
| 1985 | 10.9°C | 4.4°C | -2.1°C | 18.6°C | -8.7°C | 68 mm | 63% | 3.1 m/s | 5.3 |
| 1984 | 13.3°C | 5.4°C | -2.5°C | 18.8°C | -8.5°C | 22 mm | 49% | 2.7 m/s | 5.5 |
| 1983 | 10.9°C | 4.5°C | -1.8°C | 20.2°C | -6.2°C | 99 mm | 70% | 3 m/s | — |
| 1982 | 11.3°C | 4.7°C | -1.8°C | 18.0°C | -6.7°C | 80 mm | 62% | 3.1 m/s | — |
| 1981 | 11.5°C | 4.3°C | -2.9°C | 20.6°C | -5.1°C | 60 mm | 57% | 2.7 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 13.3°C with lows near -1.2°C (mean 6.1°C), based on 45 years of NASA POWER data.
March averages 46 mm of rainfall in Flagstaff, about average for rainfall. The wettest on record was 143 mm in 1991.
The hottest March reached 25.6°C in 2004. The coldest dipped to -14.4°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.7°C. Daytime highs moved from 11.6°C to 12.2°C and overnight lows from -2.2°C to -1.4°C over the same span.
March is one of the cooler months of the year in Flagstaff and about average for rainfall, so plan for around 13.3°C daytime highs and -1.2°C at night.
Not quite — March is the 5th coolest month in Flagstaff, averaging 6.1°C.
For March in Flagstaff, pack warm layers and a jacket for chilly mornings, with typical highs of 13.3°C and lows of -1.2°C.
Relative humidity in March averages 54% — relatively dry.
Average wind speed in March is 2.7 m/s. The windiest March on record averaged 3.4 m/s (2023).
The wettest March on record was 1991 with 143 mm. On average, March sees 46 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
