Climate averages 1991–2020
Boise weather
in March.
A cool, fairly dry month: the 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cool month in Boise: daytime highs average 11.9°C and nights cool to about 0.9°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 36 mm of rain on roughly 9 days, which makes March a fairly dry month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 54 min on an average March day.
The nearest other city in this atlas is Meridian (15 km away). In March its highs average 12.1°C, about as warm as Boise, with 31 mm of rain.
Among the 498 cities listed in the United States, Boise ranks joint 314th of 498 for the warmest March highs and joint 44th of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Boise is 3.0°C cooler than that mean.
From March to April, average highs rise by 4.0°C to 15.9°C, and monthly rainfall falls from 36 mm to 31 mm.
The annual picture
March in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Boise climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.8°C-4.6°C | -4.6°C | 45 | 9.5 | 9.39 h |
| February | 6.8°C-2.5°C | -2.5°C | 31 | 7.7 | 10.510 h |
| March, selected | 11.9°C0.9°C | 0.9°C | 36 | 8.9 | 11.912 h |
| April | 15.9°C3.8°C | 3.8°C | 31 | 7.2 | 13.413 h |
| May | 21.6°C8.5°C | 8.5°C | 31 | 5.9 | 14.715 h |
| June | 26.5°C13.0°C | 13.0°C | 16 | 3.2 | 15.415 h |
| July | 32.7°C17.9°C | 17.9°C | 2.6 | 0.9 | 15.115 h |
| August | 31.9°C17.4°C | 17.4°C | 3.3 | 0.7 | 14.014 h |
| September | 26.2°C12.6°C | 12.6°C | 10 | 2.2 | 12.613 h |
| October | 17.7°C6.3°C | 6.3°C | 22 | 4.3 | 11.111 h |
| November | 9.3°C0.2°C | 0.2°C | 34 | 7.9 | 9.710 h |
| December | 3.7°C-4.1°C | -4.1°C | 50 | 10.1 | 9.09 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
March in nearby cities
- Meridian in MarchUnited States · 15 kmHigh 12.1°C · Low 0.8°C · 31 mm rain
- Nampa in MarchUnited States · 30 kmHigh 12.8°C · Low 1.5°C · 31 mm rain
- Kennewick in MarchUnited States · 370 kmHigh 14.2°C · Low 2.7°C · 24 mm rain
- Tri-Cities in MarchUnited States · 376 kmHigh 14.3°C · Low 2.8°C · 24 mm rain
- Missoula in MarchUnited States · 401 kmHigh 7.0°C · Low -1.7°C · 44 mm rain
- Bend in MarchUnited States · 413 kmHigh 8.2°C · Low -2.4°C · 56 mm rain
- Ogden in MarchUnited States · 437 kmHigh 8.6°C · Low -1.9°C · 50 mm rain
- Layton in MarchUnited States · 449 kmHigh 8.6°C · Low -2.0°C · 46 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Boise) is explained once on the Boise year overview and on the Sources, method and limits page.