March is one of the cooler months of the year in Idaho Falls, with average highs near 6.4°C and lows around -4.6°C (mean 0.9°C). It is about average for rainfall, averaging 48 mm of rainfall and 71% relative humidity across the period.
March is one of the cooler months of the year in Idaho Falls. Across 45 years of records, the warmest March in Idaho Falls was 2015 — when the month averaged 4.6°C — while the coldest was 2023 at -5.3°C. Typical March days reach 6.4°C with nights near -4.6°C. The long-term March temperature trend is broadly flat.
March is about average for rainfall in Idaho Falls, averaging 48 mm of rainfall. The wettest March on record was 1995 with 95 mm, while the driest was 1994 at 9 mm.
Relative humidity in Idaho Falls during March averages 71%. The most humid March was 2023 at 86%, and the least humid was 1994 at 61%.
March receives about 4 kWh/m²/day of solar energy in Idaho Falls. The sunniest March was 2021 at 4.9 kWh/m²/day, and the cloudiest was 1989 at 3.2.
Average wind speed in Idaho Falls during March is 3 m/s. The windiest March was 2003 at 4.1 m/s, while the calmest was 1992 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 0.5°C | 1.1°C | 1.1°C | 1.4°C | 0.1°C | -0.4°C |
| Avg High | 5.8°C | 6.8°C | 6.7°C | 6.8°C | 5.5°C | -0.3°C |
| Avg Low | -4.8°C | -4.7°C | -4.6°C | -4.1°C | -5.3°C | -0.5°C |
| Avg Rain | 43 mm | 43 mm | 39 mm | 59 mm | 58 mm | +15 mm |
March temperatures in Idaho Falls have stayed relatively stable across the record.
March has ranged from a record low of -27.9°C (1989) to a record high of 20.9°C (2022).
Rainfall in March is about average for rainfall, averaging 48 mm, with a wettest year of 95 mm.
A good time to visit Idaho Falls
March is a good time to visit Idaho Falls, with days averaging 6.4°C and nights around -4.6°C (mean 0.9°C, cooler than Idaho 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 | 7.5°C | 2.1°C | -3.3°C | 18.8°C | -7.5°C | 56 mm | 71% | 3.4 m/s | 4.2 |
| 2024 | 4.9°C | -0.7°C | -6.2°C | 14.2°C | -19.2°C | 91 mm | 80% | 2.7 m/s | 4.1 |
| 2023 ❄️ | -0.3°C | -5.3°C | -10.3°C | 4.0°C | -17.6°C | 81 mm | 86% | 3 m/s | 4.4 |
| 2022 | 8.3°C | 2.3°C | -3.6°C | 20.9°C | -16.6°C | 24 mm | 63% | 3.1 m/s | 4.4 |
| 2021 | 7.0°C | 1.2°C | -4.6°C | 14.8°C | -14.0°C | 26 mm | 66% | 2.8 m/s | 4.9 |
| 2020 | 5.4°C | 0.8°C | -3.9°C | 10.3°C | -16.0°C | 71 mm | 75% | 3.1 m/s | 4.3 |
| 2019 | 3.2°C | -2.2°C | -7.5°C | 14.2°C | -19.7°C | 22 mm | 81% | 2.2 m/s | 4.3 |
| 2018 | 4.4°C | -0.5°C | -5.4°C | 12.6°C | -14.9°C | 90 mm | 78% | 3 m/s | 3.7 |
| 2017 | 8.1°C | 3.1°C | -2.0°C | 19.0°C | -12.9°C | 61 mm | 80% | 3.4 m/s | 3.7 |
| 2016 | 7.2°C | 1.8°C | -3.5°C | 13.3°C | -10.8°C | 91 mm | 72% | 3.3 m/s | 3.9 |
| 2015 🔥 | 11.2°C | 4.6°C | -2.0°C | 18.0°C | -12.6°C | 19 mm | 62% | 2.8 m/s | 4.6 |
| 2014 | 6.9°C | 1.7°C | -3.5°C | 16.0°C | -8.2°C | 92 mm | 69% | 3.3 m/s | 3.7 |
| 2013 | 6.5°C | 0.9°C | -4.7°C | 17.7°C | -13.3°C | 39 mm | 68% | 2.8 m/s | 4.1 |
| 2012 | 9.0°C | 2.9°C | -3.1°C | 20.0°C | -15.6°C | 52 mm | 71% | 3.9 m/s | 3.8 |
| 2011 | 4.1°C | -0.6°C | -5.3°C | 14.2°C | -12.0°C | 85 mm | 80% | 3.5 m/s | 3.3 |
| 2010 | 7.5°C | 1.8°C | -3.9°C | 13.2°C | -7.3°C | 38 mm | 68% | 2.7 m/s | 4 |
| 2009 | 4.8°C | -0.3°C | -5.5°C | 17.5°C | -13.8°C | 61 mm | 72% | 3.4 m/s | 3.8 |
| 2008 | 2.0°C | -3.0°C | -8.0°C | 7.8°C | -14.5°C | 52 mm | 78% | 3 m/s | 4 |
| 2007 | 10.3°C | 3.7°C | -2.9°C | 17.6°C | -17.6°C | 21 mm | 65% | 3.1 m/s | 4.2 |
| 2006 | 4.2°C | -0.9°C | -6.1°C | 14.7°C | -15.8°C | 61 mm | 74% | 3.1 m/s | 4 |
| 2005 | 7.1°C | 1.8°C | -3.4°C | 15.3°C | -6.9°C | 46 mm | 68% | 2.9 m/s | 4 |
| 2004 | 10.2°C | 3.8°C | -2.6°C | 20.2°C | -10.4°C | 20 mm | 65% | 2.8 m/s | 4.3 |
| 2003 | 7.7°C | 2.2°C | -3.4°C | 18.2°C | -11.2°C | 37 mm | 68% | 4.1 m/s | 3.5 |
| 2002 | 4.0°C | -1.5°C | -7.1°C | 16.2°C | -23.1°C | 33 mm | 73% | 3.2 m/s | 3.9 |
| 2001 | 9.5°C | 3.3°C | -2.8°C | 15.4°C | -9.4°C | 23 mm | 63% | 2.6 m/s | 4 |
| 2000 | 7.4°C | 1.6°C | -4.1°C | 15.6°C | -10.5°C | 40 mm | 64% | 3 m/s | 4 |
| 1999 | 7.6°C | 1.7°C | -4.3°C | 18.1°C | -12.0°C | 23 mm | 64% | 3.2 m/s | 3.9 |
| 1998 | 5.2°C | -0.3°C | -5.7°C | 13.7°C | -18.8°C | 46 mm | 75% | 2.5 m/s | 4.2 |
| 1997 | 4.5°C | -1.1°C | -6.7°C | 15.4°C | -18.3°C | 49 mm | 77% | 3 m/s | 3.9 |
| 1996 | 6.4°C | 0.5°C | -5.5°C | 13.7°C | -12.0°C | 53 mm | 72% | 3.1 m/s | 3.9 |
| 1995 🌧️ | 6.2°C | 0.9°C | -4.5°C | 13.2°C | -12.9°C | 95 mm | 71% | 3.6 m/s | 3.7 |
| 1994 | 8.9°C | 2.6°C | -3.8°C | 17.3°C | -8.4°C | 9 mm | 61% | 3 m/s | 4.4 |
| 1993 | 4.6°C | -1.1°C | -6.7°C | 17.2°C | -19.1°C | 48 mm | 83% | 2.3 m/s | 4.1 |
| 1992 | 10.4°C | 4.5°C | -1.4°C | 15.7°C | -5.3°C | 27 mm | 64% | 2.1 m/s | 4.4 |
| 1991 | 6.1°C | 1.0°C | -4.2°C | 15.4°C | -9.8°C | 56 mm | 65% | 3.5 m/s | 3.9 |
| 1990 | 8.1°C | 2.1°C | -4.0°C | 16.0°C | -7.6°C | 30 mm | 65% | 2.7 m/s | 3.9 |
| 1989 | 4.9°C | 0.1°C | -4.7°C | 12.8°C | -27.9°C | 85 mm | 78% | 3.4 m/s | 3.2 |
| 1988 | 5.9°C | 0.2°C | -5.4°C | 15.3°C | -12.4°C | 24 mm | 62% | 3.7 m/s | 3.8 |
| 1987 | 7.0°C | 1.5°C | -4.0°C | 16.7°C | -12.5°C | 32 mm | 63% | 3 m/s | 4.2 |
| 1986 | 9.8°C | 3.7°C | -2.3°C | 19.9°C | -6.7°C | 40 mm | 71% | 2.8 m/s | 3.9 |
| 1985 | 2.6°C | -3.2°C | -8.9°C | 12.7°C | -24.4°C | 46 mm | 79% | 2.9 m/s | 4.3 |
| 1984 | 2.6°C | -1.9°C | -6.5°C | 10.4°C | -18.0°C | 29 mm | 82% | 2.7 m/s | 4 |
| 1983 | 6.0°C | 1.3°C | -3.4°C | 14.7°C | -9.5°C | 49 mm | 76% | 3 m/s | — |
| 1982 | 4.6°C | 0.0°C | -4.6°C | 10.9°C | -8.6°C | 51 mm | 75% | 3.5 m/s | — |
| 1981 | 8.8°C | 2.9°C | -3.0°C | 12.5°C | -6.2°C | 31 mm | 63% | 2.5 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 6.4°C with lows near -4.6°C (mean 0.9°C), based on 45 years of NASA POWER data.
March averages 48 mm of rainfall in Idaho Falls, about average for rainfall. The wettest on record was 95 mm in 1995.
The hottest March reached 20.9°C in 2022. The coldest dipped to -27.9°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Daytime highs rose from 4.9°C to 5.5°C while overnight lows fell from -5.3°C to -5.6°C, widening the gap between day and night.
March is one of the cooler months of the year in Idaho Falls and about average for rainfall, so plan for around 6.4°C daytime highs and -4.6°C at night.
Not quite — March is the 5th coolest month in Idaho Falls, averaging 0.9°C.
For March in Idaho Falls, pack warm layers and a jacket for chilly mornings, with typical highs of 6.4°C and lows of -4.6°C.
Relative humidity in March averages 71% — moderately humid.
Average wind speed in March is 3 m/s. The windiest March on record averaged 4.1 m/s (2003).
The wettest March on record was 1995 with 95 mm. On average, March sees 48 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 Idaho 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.
