Stevensville, Montana climate: Normal weather by month, frost dates and records
Stevensville's normal year runs from 19°F December nights to 85°F July afternoons, with 12.4 inches of precipitation and 17 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.6°C, December lows of −7°C, July highs of 30°C, 316 mm of precipitation a year.
- NOAA stationStevensville
- Station IDUSC00247894
- Location46.51°N 114.09°W
- Elevation3,375 ft (1,029 m)
- From the centerunder 1 mile
- Population2,236
On October 23, the normal high in Stevensville is 54°F and the normal low 30°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Stevensville.
- Jan 35° 19°
- Feb 38° 21°
- Mar 50° 26°
- Apr 58° 32°
- May 68° 39°
- Jun 75° 45°
- Jul 85° 49°
- Aug 84° 47°
- Sep 74° 40°
- Oct 58° 32°
- Nov 43° 25°
- Dec 33° 19°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Stevensville each month?
July is the warmest month, with normal highs of 85°F; December the coldest, with normal lows of 19°F. The most precipitation falls in June (1.59 in), the least in March (0.77 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 35°F | 19°F | 26.8°F | 1.00 | 4.0 | 9 | <1 | 29 | 9 h |
| February | 38°F | 21°F | 29.8°F | 0.92 | 3.0 | 8 | <1 | 26 | 10 h 20 min |
| March | 50°F | 26°F | 38.0°F | 0.77 | 1.5 | 10 | <1 | 25 | 11 h 50 min |
| April | 58°F | 32°F | 45.0°F | 0.93 | 0.1 | 9 | <1 | 16 | 13 h 30 min |
| May | 68°F | 39°F | 53.2°F | 1.45 | 0.0 | 10 | 1 | 6 | 15 h |
| June | 75°F | 45°F | 60.1°F | 1.59 | 0.0 | 10 | 2 | <1 | 15 h 50 min |
| July | 85°F | 49°F | 67.1°F | 0.83 | 0.0 | 6 | 14 | <1 | 15 h 30 min |
| August | 84°F | 47°F | 65.6°F | 0.81 | 0.0 | 6 | 10 | <1 | 14 h 20 min |
| September | 74°F | 40°F | 57.0°F | 0.84 | 0.0 | 7 | 2 | 4 | 12 h 40 min |
| October | 58°F | 32°F | 45.0°F | 1.04 | 0.1 | 9 | <1 | 16 | 11 h |
| November | 43°F | 25°F | 33.5°F | 1.15 | 1.6 | 9 | <1 | 25 | 9 h 30 min |
| December | 33°F | 19°F | 26.0°F | 1.12 | 6.8 | 9 | <1 | 29 | 8 h 40 min |
| Year (annual) | 58°F | 33°F | 45.6°F | 12.45 | 17.1 | 100 | 28 | 175 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −7°C | −2.9°C | 25 mm | 10 cm |
| February | 3°C | −6°C | −1.2°C | 23 mm | 8 cm |
| March | 10°C | −3°C | 3.3°C | 20 mm | 4 cm |
| April | 14°C | 0°C | 7.2°C | 24 mm | 0 cm |
| May | 20°C | 4°C | 11.8°C | 37 mm | 0 cm |
| June | 24°C | 7°C | 15.6°C | 40 mm | 0 cm |
| July | 30°C | 9°C | 19.5°C | 21 mm | 0 cm |
| August | 29°C | 8°C | 18.7°C | 21 mm | 0 cm |
| September | 23°C | 5°C | 13.9°C | 21 mm | 0 cm |
| October | 14°C | 0°C | 7.2°C | 26 mm | 0 cm |
| November | 6°C | −4°C | 0.8°C | 29 mm | 4 cm |
| December | 1°C | −7°C | −3.3°C | 28 mm | 17 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00247894; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Stevensville?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, August has the fewest days with rain (6).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00247894.
When is the last frost in Stevensville?
In Stevensville, the last spring frost (32°F) comes after May 22 in half of years and after June 13 in one year in ten; the first autumn frost comes before September 19 in half of years and before September 3 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 221 year in 10 after June 13; 9 in 10 after May 7
- First autumn frost, half of years before
- September 191 year in 10 before September 3; 9 in 10 before October 2
NOAA puts the median frost-free season at 115 days, and the season without a hard freeze (28°F) at 147 days.
A hard freeze (28°F) comes after May 5 in half of springs and before October 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Stevensville in zone 5b in ZIP code 59870, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Stevensville's NOAA station is in zone 5b: the coldest night of a typical year reaches −12°F (27 complete years).
Frost dates for every NOAA station in Montana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00247894; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Stevensville?
In a normal year in Stevensville, 28 days a year reach 90°F (2 of them 100°F or more), 175 nights fall to 32°F or colder and 100 days bring measurable precipitation.
- Days at 90°F or more
- 28a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 175a normal year
- Days that stay below freezing
- 29high of 32°F or less
- Days with 0.01 inch of precipitation
- 100a normal year
- Days with 1 inch of snow or more
- 5a normal year
The highest temperature in this station's record (since 1911) is 106°F, on July 22, 2006; the lowest is −37°F, on February 15, 1936.
The wettest calendar year on that record is 1980, with 17.59 in; the snowiest season is 1950–51, with 53.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00247894; records: ACIS (NOAA Regional Climate Centers), station USC00247894. Records use complete months only; a month missing more than three days is left out.
How sunny is Stevensville?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Stevensville, 3.8 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.3 |
| February | 58% | 2.0 |
| March | 59% | 3.1 |
| April | 64% | 4.4 |
| May | 68% | 5.6 |
| June | 73% | 6.4 |
| July | 89% | 7.4 |
| August | 86% | 6.2 |
| September | 79% | 4.4 |
| October | 67% | 2.6 |
| November | 56% | 1.4 |
| December | 52% | 1.0 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Stevensville need?
A normal year in Stevensville brings 7,270 heating degree days, 35% more than the median U.S. place (5,373), and 217 cooling degree days, 76% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,760 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,186 | 0 |
| February | 987 | 0 |
| March | 839 | 0 |
| April | 600 | 0 |
| May | 369 | 3 |
| June | 171 | 24 |
| July | 42 | 109 |
| August | 58 | 74 |
| September | 248 | 8 |
| October | 619 | 0 |
| November | 945 | 0 |
| December | 1,209 | 0 |
| Year (annual) | 7,270 | 217 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00247894. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Stevensville been warmer than normal lately?
2023 averaged 47.5°F, 1.9°F above the 1991-2020 normal of 45.6°F. 2 of the 2 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 46.0°F | +0.4°F | 10.91 | – |
| 2023 | 47.5°F | +1.9°F | 9.58 | – |
Over 81 complete years from 1912 to 2022, the station's annual mean temperature rose at a fitted 2.2°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00247894; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Stevensville's climate compare?
Stevensville is warmer than 109 of the other 140 places with their own NOAA record in Montana, and wetter than 22. Across the 7,247 U.S. stations with normals, its annual mean of 45.6°F is warmer than 22%.
In the Köppen classification computed from these normals, Stevensville is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Stevensville share this climate record?
2 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Florence, MT993 people · 8 mi N
- Carlton, MT497 people · 12 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Stevensville's climate
What is the coldest month in Stevensville?
December, with a normal high of 33°F and a normal low of 19°F. The warmest is July (85°F by day, 49°F at night).
Does it snow in Stevensville?
Yes: 17 inches in a normal year, falling on 9 days with 0.1 inch or more, the most in December (6.8 inches).
What is the rainiest month in Stevensville?
June, with 1.59 in of precipitation in a normal year; the driest is March with 0.77 in.
What plant hardiness zone is Stevensville in?
The USDA's 2023 map puts Stevensville in zone 5b in ZIP code 59870, the nearest ZIP area. By the same method at Stevensville's NOAA station, the coldest night of a typical year reaches −12°F (27 years, 1991-2020): zone 5b.
How late can frost come in Stevensville?
In half of years the last 32°F night comes after May 22; in one year in ten it comes after June 13. Waiting until June 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Western Agricultural Research Center, MT13 miles from this station, 45.7°F a year
- Hamilton, MT19 miles from this station, 44.8°F a year
- Missoula, MT28 miles from this station, 45.2°F a year
- Powell, ID29 miles from this station, 42.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made