Climate averages 1991–2020
Billings weather
in May.
A mild, moderately wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Billings: daytime highs average 19.6°C and nights cool to about 7.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 65 mm of rain on roughly 11 days, which makes May a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 54 min on an average May day.
The nearest other city in this atlas is Missoula (439 km away). In May its highs average 17.9°C, 1.8°C cooler than Billings, with 56 mm of rain.
Among the 498 cities listed in the United States, Billings ranks joint 406th of 498 for the warmest May highs and joint 169th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Billings is 4.2°C cooler than that mean.
From May to June, average highs rise by 5.3°C to 24.9°C, and monthly rainfall falls from 65 mm to 53 mm.
The annual picture
May in context
Monthly precipitation
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
Billings climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.3°C-8.8°C | -8.8°C | 22 | 5.7 | 9.19 h |
| February | 3.5°C-7.6°C | -7.6°C | 20 | 6.1 | 10.310 h |
| March | 9.4°C-3.2°C | -3.2°C | 31 | 7.1 | 11.912 h |
| April | 13.9°C1.2°C | 1.2°C | 59 | 10.8 | 13.514 h |
| May, selected | 19.6°C7.0°C | 7.0°C | 65 | 10.7 | 14.915 h |
| June | 24.9°C12.0°C | 12.0°C | 53 | 9.0 | 15.716 h |
| July | 30.7°C16.6°C | 16.6°C | 24 | 4.8 | 15.315 h |
| August | 30.0°C15.8°C | 15.8°C | 18 | 3.9 | 14.114 h |
| September | 23.7°C10.4°C | 10.4°C | 35 | 5.5 | 12.613 h |
| October | 15.1°C3.3°C | 3.3°C | 46 | 7.2 | 11.011 h |
| November | 7.4°C-3.0°C | -3.0°C | 23 | 5.9 | 9.510 h |
| December | 1.8°C-7.5°C | -7.5°C | 20 | 5.5 | 8.79 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
May in nearby cities
- Missoula in MayUnited States · 439 kmHigh 17.9°C · Low 6.3°C · 56 mm rain
- Rapid City in MayUnited States · 456 kmHigh 18.4°C · Low 7.2°C · 112 mm rain
- Lethbridge in MayCanada · 542 kmHigh 17.1°C · Low 5.4°C · 59 mm rain
- Ogden in MayUnited States · 579 kmHigh 19.6°C · Low 7.4°C · 59 mm rain
- Regina in MayCanada · 593 kmHigh 16.7°C · Low 4.9°C · 62 mm rain
- Layton in MayUnited States · 595 kmHigh 19.3°C · Low 7.2°C · 56 mm rain
- Bismarck in MayUnited States · 603 kmHigh 18.4°C · Low 7.3°C · 73 mm rain
- Salt Lake City in MayUnited States · 622 kmHigh 20.1°C · Low 7.7°C · 56 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 Billings) is explained once on the Billings year overview and on the Sources, method and limits page.