Sidney, MT Weather & Climate Normals
What a normal year in Sidney actually looks like
On the 30-year record NOAA keeps for Sidney, MT, the comfort score comes out to 42/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Sidney's weather actually swings
Average temperatures in Sidney run from 17°F in Jan up to 72°F in Jul, a 55°F seasonal swing, one of the widest gaps in this dataset.
Sidney, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 27°F | 7°F | 0.45in | 7in |
| Feb | 32°F | 11°F | 0.37in | 5.6in |
| Mar | 46°F | 21°F | 0.58in | 3in |
| Apr | 61°F | 32°F | 1.17in | 1.7in |
| May | 71°F | 43°F | 2.4in | 0.7in |
| Jun | 79°F | 52°F | 2.78in | 0in |
| Jul | 87°F | 57°F | 2.65in | 0in |
| Aug | 86°F | 55°F | 1.3in | 0in |
| Sep | 76°F | 46°F | 1.62in | 0in |
| Oct | 59°F | 34°F | 1.08in | 1.5in |
| Nov | 42°F | 21°F | 0.59in | 3in |
| Dec | 31°F | 11°F | 0.51in | 7.9in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Sidney's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet Sidney actually gets
Over a typical year, Sidney sees about 15.5in of precipitation a year across roughly 85 days with measurable rain or snow, with 30.4in of snow a year.
Sidney against the rest of the country
Out of 4876 cities scored here, Sidney comes in at 4319; within MT alone it ranks 10 of 19. Population is about 6,031.
Checking the actual forecast
These figures come from Sidney, MT US, the NOAA station 1.3 miles from Sidney, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is