Climate averages 1991–2020
Nampa 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 Nampa: daytime highs average 12.8°C and nights cool to about 1.5°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 31 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 (16 km away). In March its highs average 12.1°C, 0.7°C cooler than Nampa, with 31 mm of rain.
Among the 498 cities listed in the United States, Nampa ranks 293rd of 498 for the warmest March highs and joint 34th of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Nampa is 2.1°C cooler than that mean.
From March to April, average highs rise by 4.0°C to 16.8°C, and monthly rainfall falls from 31 mm to 28 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
Nampa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.6°C-3.4°C | -3.4°C | 40 | 9.0 | 9.39 h |
| February | 7.7°C-1.9°C | -1.9°C | 26 | 7.4 | 10.510 h |
| March, selected | 12.8°C1.5°C | 1.5°C | 31 | 8.6 | 11.912 h |
| April | 16.8°C4.7°C | 4.7°C | 28 | 6.4 | 13.413 h |
| May | 22.4°C9.8°C | 9.8°C | 29 | 5.9 | 14.715 h |
| June | 27.3°C14.2°C | 14.2°C | 16 | 3.4 | 15.415 h |
| July | 33.3°C19.2°C | 19.2°C | 3.4 | 1.0 | 15.115 h |
| August | 32.3°C18.3°C | 18.3°C | 3.4 | 0.9 | 14.014 h |
| September | 26.5°C13.4°C | 13.4°C | 9.8 | 2.0 | 12.613 h |
| October | 18.2°C6.9°C | 6.9°C | 20 | 4.2 | 11.111 h |
| November | 9.9°C0.9°C | 0.9°C | 30 | 7.3 | 9.710 h |
| December | 4.4°C-2.9°C | -2.9°C | 42 | 9.3 | 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 · 16 kmHigh 12.1°C · Low 0.8°C · 31 mm rain
- Boise in MarchUnited States · 30 kmHigh 11.9°C · Low 0.9°C · 36 mm rain
- Kennewick in MarchUnited States · 360 kmHigh 14.2°C · Low 2.7°C · 24 mm rain
- Tri-Cities in MarchUnited States · 365 kmHigh 14.3°C · Low 2.8°C · 24 mm rain
- Bend in MarchUnited States · 386 kmHigh 8.2°C · Low -2.4°C · 56 mm rain
- Missoula in MarchUnited States · 422 kmHigh 7.0°C · Low -1.7°C · 44 mm rain
- Ogden in MarchUnited States · 457 kmHigh 8.6°C · Low -1.9°C · 50 mm rain
- Yakima in MarchUnited States · 460 kmHigh 10.9°C · Low -0.4°C · 33 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 Nampa) is explained once on the Nampa year overview and on the Sources, method and limits page.
Meridian lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.