Austin (1 mi W), Montana climate: Climate normals at a NOAA weather station
Austin (1 mi W)'s normal year runs from 13°F January nights to 78°F July afternoons, with 16.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 4.6°C, January lows of −11°C, July highs of 26°C, 418 mm of precipitation a year.
- NOAA stationAustin (1 mi W)
- Station IDUSC00240375
- Location46.65°N 112.27°W
- Elevation4,851 ft (1,479 m)
On October 9, the normal high in Austin (1 mi W) is 55°F and the normal low 32°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Austin (1 mi W).
- Jan 30° 13°
- Feb 32° 13°
- Mar 42° 19°
- Apr 50° 26°
- May 60° 35°
- Jun 68° 42°
- Jul 78° 49°
- Aug 78° 47°
- Sep 67° 39°
- Oct 51° 30°
- Nov 37° 20°
- Dec 29° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Austin (1 mi W) each month?
July is the warmest month, with normal highs of 78°F; January the coldest, with normal lows of 13°F. The most precipitation falls in June (2.74 in), the least in January (0.84 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 13°F | 21.0°F | 0.84 | 6 | <1 | 30 | 9 h |
| February | 32°F | 13°F | 22.5°F | 0.99 | 5 | <1 | 27 | 10 h 20 min |
| March | 42°F | 19°F | 30.4°F | 0.84 | 6 | <1 | 29 | 11 h 50 min |
| April | 50°F | 26°F | 38.0°F | 1.66 | 8 | <1 | 23 | 13 h 30 min |
| May | 60°F | 35°F | 47.7°F | 2.34 | 9 | <1 | 11 | 15 h |
| June | 68°F | 42°F | 55.0°F | 2.74 | 9 | 1 | 1 | 15 h 50 min |
| July | 78°F | 49°F | 63.6°F | 1.22 | 6 | 2 | <1 | 15 h 30 min |
| August | 78°F | 47°F | 62.8°F | 1.09 | 6 | 1 | <1 | 14 h 20 min |
| September | 67°F | 39°F | 53.1°F | 1.28 | 6 | <1 | 5 | 12 h 40 min |
| October | 51°F | 30°F | 40.4°F | 1.25 | 7 | <1 | 18 | 11 h |
| November | 37°F | 20°F | 28.1°F | 1.27 | 6 | <1 | 27 | 9 h 30 min |
| December | 29°F | 13°F | 21.0°F | 0.93 | 6 | <1 | 31 | 8 h 40 min |
| Year (annual) | 52°F | 29°F | 40.3°F | 16.45 | 78 | 4 | 204 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −11°C | −6.1°C | 21 mm |
| February | 0°C | −11°C | −5.3°C | 25 mm |
| March | 5°C | −7°C | −0.9°C | 21 mm |
| April | 10°C | −3°C | 3.3°C | 42 mm |
| May | 16°C | 2°C | 8.7°C | 59 mm |
| June | 20°C | 6°C | 12.8°C | 70 mm |
| July | 26°C | 9°C | 17.6°C | 31 mm |
| August | 26°C | 8°C | 17.1°C | 28 mm |
| September | 20°C | 4°C | 11.7°C | 33 mm |
| October | 11°C | −1°C | 4.7°C | 32 mm |
| November | 3°C | −7°C | −2.2°C | 32 mm |
| December | −1°C | −11°C | −6.1°C | 24 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Helena (15 miles away), gets 37 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00240375; 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.
Which months are mildest at Austin (1 mi W)?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September 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 USC00240375.
When is the last frost at Austin (1 mi W)?
In Austin (1 mi W), the last spring frost (32°F) comes after June 4 in half of years and after June 18 in one year in ten; the first autumn frost comes before September 14 in half of years and before August 30 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
- June 41 year in 10 after June 18; 9 in 10 after May 18
- First autumn frost, half of years before
- September 141 year in 10 before August 30; 9 in 10 before September 27
NOAA puts the median frost-free season at 100 days, and the season without a hard freeze (28°F) at 134 days.
A hard freeze (28°F) comes after May 14 in half of springs and before September 26 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Austin (1 mi W) in zone 4b in ZIP code 59601, the nearest ZIP area.
Frost dates for every NOAA station in Montana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00240375; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 at Austin (1 mi W)?
In a normal year in Austin (1 mi W), 4 days a year reach 90°F, 204 nights fall to 32°F or colder and 78 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 204a normal year
- Days that stay below freezing
- 58high of 32°F or less
- Days with 0.01 inch of precipitation
- 78a normal year
The highest temperature in this station's record (since 1950) is 100°F, on August 5, 1961; the lowest is −41°F, on December 24, 1983.
The wettest calendar year on that record is 1993, with 26.19 in; the snowiest season is 2002–03, with 91.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00240375; records: ACIS (NOAA Regional Climate Centers), station USC00240375. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Austin (1 mi W)?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds at Austin (1 mi W), 4.0 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.5 |
| February | 70% | 2.5 |
| March | 69% | 3.7 |
| April | 68% | 4.8 |
| May | 69% | 5.7 |
| June | 74% | 6.5 |
| July | 86% | 7.3 |
| August | 84% | 6.0 |
| September | 79% | 4.5 |
| October | 70% | 2.8 |
| November | 64% | 1.6 |
| December | 61% | 1.2 |
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 many heating and cooling degree days does Austin (1 mi W) record?
A normal year at Austin (1 mi W) brings 9,076 heating degree days, 69% more than the median U.S. place (5,373), and 109 cooling degree days, 88% fewer than the median (908). Ten months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,244 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,363 | 0 |
| February | 1,191 | 0 |
| March | 1,073 | 0 |
| April | 808 | 0 |
| May | 535 | 0 |
| June | 306 | 6 |
| July | 98 | 53 |
| August | 114 | 45 |
| September | 360 | 4 |
| October | 761 | 0 |
| November | 1,105 | 0 |
| December | 1,362 | 0 |
| Year (annual) | 9,076 | 109 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00240375. 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.
How does Austin (1 mi W)'s climate compare?
Austin (1 mi W) is warmer than 17 of the 141 places with their own NOAA record in Montana, and wetter than 99. Across the 7,247 U.S. stations with normals, its annual mean of 40.3°F is warmer than 6%.
In the Köppen classification computed from these normals, Austin (1 mi W) 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 Austin (1 mi W) 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.
- Marysville, MT97 people · 7 mi N
- Canyon Creek, MT28 people · 11 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 Austin (1 mi W)'s climate
What is the coldest month at Austin (1 mi W)?
January, with a normal high of 30°F and a normal low of 13°F. The warmest is July (78°F by day, 49°F at night).
Does it snow at Austin (1 mi W)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Helena (15 miles away), records 37 inches of snow in a normal year.
What is the rainiest month at Austin (1 mi W)?
June, with 2.74 in of precipitation in a normal year; the driest is January with 0.84 in.
What plant hardiness zone is Austin (1 mi W) in?
The USDA's 2023 map puts Austin (1 mi W) in zone 4b in ZIP code 59601, the nearest ZIP area.
How late can frost come at Austin (1 mi W)?
In half of years the last 32°F night comes after June 4; in one year in ten it comes after June 18. Waiting until June 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Elliston, MT10 miles from this station, 40.3°F a year
- Helena, MT14 miles from this station, 45.5°F a year
- Tizer Gardens, MT22 miles from this station, 41.0°F a year
- Holter Dam, MT27 miles from this station, 46.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made