March is one of the cooler months of the year in Great Falls, with average highs near 7.3°C and lows around -4°C (mean 1.7°C). It is about average for rainfall, averaging 30 mm of rainfall and 68% relative humidity across the period.
March is one of the cooler months of the year in Great Falls. Across 45 years of records, the warmest Marchs in Great Falls were 1986, 1992 and 2015 — when the month averaged 5.2°C — while the coldest was 2002 at -4.8°C. Typical March days reach 7.3°C with nights near -4°C. The long-term March temperature trend is broadly flat.
March is about average for rainfall in Great Falls, averaging 30 mm of rainfall. The wettest March on record was 1981 with 65 mm, while the driest was 1994 at 12 mm.
Relative humidity in Great Falls during March averages 68%. The most humid March was 2019 at 80%, and the least humid was 2004 at 60%.
March receives about 3.6 kWh/m²/day of solar energy in Great Falls. The sunniest Marchs were 2019 and 2023 at 4.4 kWh/m²/day, and the cloudiest was 1989 at 3.
Average wind speed in Great Falls during March is 3 m/s. The windiest Marchs were 1988 and 2012 at 3.8 m/s, while the calmest was 1992 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.6°C | 1.6°C | 1.3°C | 2.1°C | 1.8°C | +0.2°C |
| Avg High | 7.0°C | 7.4°C | 7.0°C | 8.0°C | 7.3°C | +0.3°C |
| Avg Low | -3.8°C | -4.2°C | -4.4°C | -3.8°C | -3.7°C | +0.1°C |
| Avg Rain | 40 mm | 28 mm | 29 mm | 27 mm | 27 mm | -13 mm |
March temperatures in Great Falls have risen by about 0.7°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -31.7°C (2019) to a record high of 24.5°C (2004).
Rainfall in March is about average for rainfall, averaging 30 mm, with a wettest year of 65 mm.
A good time to visit Great Falls
March is a good time to visit Great Falls, with days averaging 7.3°C and nights around -4°C (mean 1.7°C, cooler than Great Falls's yearly average) and moderate rainfall. July and August are marginally more temperate, but March still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 9.5°C | 4.3°C | -0.8°C | 18.6°C | -4.8°C | 31 mm | 66% | 3.1 m/s | 3.3 |
| 2024 | 7.3°C | 1.5°C | -4.2°C | 17.8°C | -11.7°C | 24 mm | 69% | 2.4 m/s | 3.2 |
| 2023 | 3.2°C | -1.7°C | -6.7°C | 10.5°C | -12.0°C | 35 mm | 71% | 2.5 m/s | 4.4 |
| 2022 | 8.0°C | 2.5°C | -3.1°C | 19.9°C | -15.9°C | 29 mm | 66% | 3.2 m/s | 3.5 |
| 2021 | 9.6°C | 3.4°C | -2.7°C | 17.2°C | -7.8°C | 15 mm | 63% | 3.2 m/s | 3.9 |
| 2020 | 6.1°C | 0.7°C | -4.7°C | 17.6°C | -17.0°C | 27 mm | 66% | 3.4 m/s | 3.9 |
| 2019 | 3.7°C | -3.0°C | -9.6°C | 18.3°C | -31.7°C | 18 mm | 80% | 2.3 m/s | 4.4 |
| 2018 | 6.5°C | 0.5°C | -5.5°C | 16.6°C | -13.8°C | 32 mm | 74% | 2.8 m/s | 4.1 |
| 2017 | 9.3°C | 3.4°C | -2.5°C | 21.2°C | -12.6°C | 28 mm | 70% | 3.1 m/s | 3.7 |
| 2016 | 9.7°C | 4.0°C | -1.7°C | 18.6°C | -6.6°C | 25 mm | 64% | 3.4 m/s | 3.5 |
| 2015 | 11.6°C | 5.2°C | -1.1°C | 21.1°C | -17.1°C | 13 mm | 66% | 3.5 m/s | 3.8 |
| 2014 | 4.9°C | -0.2°C | -5.3°C | 14.0°C | -24.3°C | 46 mm | 74% | 3.4 m/s | 3.4 |
| 2013 | 7.0°C | 1.6°C | -3.8°C | 13.5°C | -9.7°C | 15 mm | 63% | 2.9 m/s | 3.6 |
| 2012 | 10.9°C | 4.4°C | -2.0°C | 20.9°C | -9.6°C | 43 mm | 67% | 3.8 m/s | 3.3 |
| 2011 | 6.1°C | 0.5°C | -5.0°C | 12.6°C | -19.0°C | 27 mm | 74% | 2.8 m/s | 3.3 |
| 2010 | 10.6°C | 4.4°C | -1.9°C | 18.0°C | -5.7°C | 22 mm | 65% | 3 m/s | 4 |
| 2009 | 4.9°C | -0.9°C | -6.8°C | 17.9°C | -21.4°C | 43 mm | 68% | 3.3 m/s | 3.6 |
| 2008 | 5.5°C | 0.7°C | -4.1°C | 13.4°C | -8.4°C | 19 mm | 62% | 3.3 m/s | 3.7 |
| 2007 | 10.9°C | 4.5°C | -1.9°C | 18.7°C | -11.1°C | 16 mm | 64% | 3.7 m/s | 4 |
| 2006 | 6.6°C | 1.2°C | -4.3°C | 17.6°C | -10.7°C | 32 mm | 67% | 2.8 m/s | 3.4 |
| 2005 | 7.5°C | 2.0°C | -3.5°C | 18.3°C | -12.4°C | 56 mm | 71% | 3.2 m/s | 3.4 |
| 2004 | 11.0°C | 4.7°C | -1.6°C | 24.5°C | -8.2°C | 17 mm | 60% | 3.7 m/s | 3.7 |
| 2003 | 5.8°C | 0.1°C | -5.6°C | 18.8°C | -22.1°C | 31 mm | 70% | 3.3 m/s | 3.4 |
| 2002 ❄️ | 0.5°C | -4.8°C | -10.0°C | 12.4°C | -22.1°C | 28 mm | 72% | 3.1 m/s | 3.3 |
| 2001 | 8.9°C | 2.8°C | -3.2°C | 16.1°C | -6.3°C | 20 mm | 62% | 2.9 m/s | 3.8 |
| 2000 | 8.2°C | 2.7°C | -2.9°C | 17.5°C | -6.7°C | 29 mm | 65% | 3.4 m/s | 3.5 |
| 1999 | 9.4°C | 3.2°C | -3.0°C | 21.6°C | -9.2°C | 14 mm | 62% | 2.7 m/s | 4 |
| 1998 | 6.5°C | 0.9°C | -4.7°C | 14.4°C | -15.1°C | 26 mm | 70% | 2.3 m/s | 3.6 |
| 1997 | 6.1°C | 0.8°C | -4.6°C | 18.2°C | -17.7°C | 28 mm | 69% | 3.6 m/s | 3.6 |
| 1996 | 2.7°C | -2.6°C | -7.9°C | 14.5°C | -19.5°C | 36 mm | 76% | 3 m/s | 3.6 |
| 1995 | 6.2°C | 0.2°C | -5.7°C | 16.4°C | -17.5°C | 39 mm | 67% | 3.1 m/s | 3.2 |
| 1994 | 9.1°C | 3.2°C | -2.7°C | 19.7°C | -6.8°C | 12 mm | 61% | 3.3 m/s | 4.1 |
| 1993 | 8.3°C | 2.3°C | -3.6°C | 19.7°C | -12.7°C | 24 mm | 70% | 2.9 m/s | 3.3 |
| 1992 | 11.7°C | 5.2°C | -1.3°C | 18.8°C | -5.7°C | 23 mm | 63% | 2 m/s | 4.1 |
| 1991 | 6.7°C | 1.4°C | -4.0°C | 17.9°C | -14.7°C | 35 mm | 65% | 3.1 m/s | 3.6 |
| 1990 | 7.4°C | 1.5°C | -4.5°C | 16.6°C | -14.2°C | 43 mm | 68% | 2.8 m/s | 3.8 |
| 1989 | 4.2°C | -1.1°C | -6.4°C | 16.2°C | -23.1°C | 37 mm | 76% | 2.8 m/s | 3 |
| 1988 | 6.8°C | 1.9°C | -3.1°C | 16.8°C | -11.0°C | 29 mm | 61% | 3.8 m/s | 3.4 |
| 1987 | 7.1°C | 1.7°C | -3.7°C | 19.2°C | -15.8°C | 51 mm | 70% | 3 m/s | 3.6 |
| 1986 🔥 | 11.3°C | 5.2°C | -0.8°C | 20.1°C | -4.7°C | 17 mm | 66% | 3.1 m/s | 3.8 |
| 1985 | 5.7°C | 0.4°C | -4.9°C | 16.3°C | -16.4°C | 33 mm | 68% | 3.1 m/s | 4 |
| 1984 | 6.4°C | 1.5°C | -3.5°C | 14.4°C | -6.3°C | 39 mm | 74% | 2.6 m/s | 3.3 |
| 1983 | 7.1°C | 2.0°C | -3.1°C | 17.9°C | -10.7°C | 37 mm | 73% | 2.5 m/s | — |
| 1982 | 4.4°C | -0.5°C | -5.5°C | 13.4°C | -12.7°C | 49 mm | 74% | 3.1 m/s | — |
| 1981 🌧️ | 9.6°C | 3.3°C | -3.0°C | 15.1°C | -10.2°C | 65 mm | 64% | 2.5 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 7.3°C with lows near -4°C (mean 1.7°C), based on 45 years of NASA POWER data.
March averages 30 mm of rainfall in Great Falls, about average for rainfall. The wettest on record was 65 mm in 1981.
The hottest March reached 24.5°C in 2004. The coldest dipped to -31.7°C in 2019.
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 6.6°C to 7.5°C and overnight lows from -4°C to -3.5°C over the same span.
March is one of the cooler months of the year in Great Falls and about average for rainfall, so plan for around 7.3°C daytime highs and -4°C at night.
Not quite — March is the 5th coolest month in Great Falls, averaging 1.7°C.
For March in Great Falls, pack warm layers and a jacket for chilly mornings, with typical highs of 7.3°C and lows of -4°C.
Relative humidity in March averages 68% — moderately humid.
Average wind speed in March is 3 m/s. The windiest March on record averaged 3.8 m/s (1988).
The wettest March on record was 1981 with 65 mm. On average, March sees 30 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 Great Falls 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.
