Brandenberg, Montana climate: Climate normals at a NOAA weather station
Brandenberg's normal year runs from 11°F January nights to 90°F July afternoons, with 15.5 inches of precipitation and 40 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, January lows of −12°C, July highs of 32°C, 393 mm of precipitation a year.
- NOAA stationBrandenberg
- Station IDUSC00241084
- Location45.82°N 106.23°W
- Elevation2,770 ft (844 m)
On October 22, the normal high in Brandenberg is 58°F and the normal low 30°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Brandenberg.
- Jan 35° 11°
- Feb 39° 14°
- Mar 50° 23°
- Apr 60° 31°
- May 70° 41°
- Jun 79° 49°
- Jul 90° 55°
- Aug 89° 53°
- Sep 77° 44°
- Oct 61° 32°
- Nov 47° 21°
- Dec 36° 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 Brandenberg each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 11°F. The most precipitation falls in May (3.12 in), the least in November (0.54 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 35°F | 11°F | 22.9°F | 0.55 | 7.5 | 7 | <1 | 30 | 9 h |
| February | 39°F | 14°F | 26.3°F | 0.61 | 8.0 | 7 | <1 | 27 | 10 h 20 min |
| March | 50°F | 23°F | 36.4°F | 0.91 | 6.9 | 7 | <1 | 26 | 11 h 50 min |
| April | 60°F | 31°F | 45.6°F | 1.71 | 4.0 | 9 | <1 | 16 | 13 h 30 min |
| May | 70°F | 41°F | 55.1°F | 3.12 | 0.5 | 11 | 1 | 5 | 14 h 50 min |
| June | 79°F | 49°F | 64.4°F | 2.55 | 0.0 | 10 | 5 | <1 | 15 h 40 min |
| July | 90°F | 55°F | 72.4°F | 1.44 | 0.0 | 7 | 17 | <1 | 15 h 20 min |
| August | 89°F | 53°F | 70.8°F | 0.91 | 0.0 | 5 | 17 | <1 | 14 h 10 min |
| September | 77°F | 44°F | 60.3°F | 1.21 | 0.0 | 6 | 5 | 2 | 12 h 40 min |
| October | 61°F | 32°F | 46.7°F | 1.37 | 1.7 | 7 | <1 | 15 | 11 h |
| November | 47°F | 21°F | 33.9°F | 0.54 | 4.4 | 6 | <1 | 27 | 9 h 30 min |
| December | 36°F | 13°F | 24.2°F | 0.55 | 7.4 | 6 | <1 | 30 | 8 h 40 min |
| Year (annual) | 61°F | 32°F | 46.6°F | 15.47 | 40.4 | 90 | 45 | 178 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 2°C | −12°C | −5.1°C | 14 mm | 19 cm |
| February | 4°C | −10°C | −3.2°C | 15 mm | 20 cm |
| March | 10°C | −5°C | 2.4°C | 23 mm | 18 cm |
| April | 16°C | 0°C | 7.6°C | 43 mm | 10 cm |
| May | 21°C | 5°C | 12.8°C | 79 mm | 1 cm |
| June | 26°C | 10°C | 18.0°C | 65 mm | 0 cm |
| July | 32°C | 13°C | 22.4°C | 37 mm | 0 cm |
| August | 32°C | 11°C | 21.6°C | 23 mm | 0 cm |
| September | 25°C | 6°C | 15.7°C | 31 mm | 0 cm |
| October | 16°C | 0°C | 8.2°C | 35 mm | 4 cm |
| November | 8°C | −6°C | 1.1°C | 14 mm | 11 cm |
| December | 2°C | −11°C | −4.3°C | 14 mm | 19 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00241084; 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 Brandenberg?
Normal highs sit between 65°F and 85°F in May, June 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 USC00241084.
When is the last frost at Brandenberg?
In Brandenberg, the last spring frost (32°F) comes after May 18 in half of years and after May 30 in one year in ten; the first autumn frost comes before September 22 in half of years and before September 8 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 181 year in 10 after May 30; 9 in 10 after May 6
- First autumn frost, half of years before
- September 221 year in 10 before September 8; 9 in 10 before October 5
NOAA puts the median frost-free season at 126 days, and the season without a hard freeze (28°F) at 148 days.
A hard freeze (28°F) comes after May 7 in half of springs and before October 2 in half of autumns.
By the USDA's method, the average of each year's coldest night over 1991-2020, the station is in plant hardiness zone 4a: the coldest night of a typical year reaches −27°F (30 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 USC00241084; 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 at Brandenberg?
In a normal year in Brandenberg, 45 days a year reach 90°F (8 of them 100°F or more), 178 nights fall to 32°F or colder and 90 days bring measurable precipitation.
- Days at 90°F or more
- 45a normal year
- Days at 100°F or more
- 8a normal year
- Nights at 32°F or colder
- 178a normal year
- Days that stay below freezing
- 37high of 32°F or less
- Days with 0.01 inch of precipitation
- 90a normal year
- Days with 1 inch of snow or more
- 16a normal year
The highest temperature in this station's record (since 1956) is 114°F, on July 12, 2026; the lowest is −44°F, on December 24, 1983.
The wettest calendar year on that record is 2019, with 21.92 in; the snowiest season is 1993–94, with 75.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00241084; records: ACIS (NOAA Regional Climate Centers), station USC00241084. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Brandenberg?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Brandenberg, 4.2 kWh per square metre a day. July is the sunniest month (89%) and April the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 1.8 |
| February | 77% | 2.8 |
| March | 73% | 3.9 |
| April | 70% | 4.9 |
| May | 72% | 5.9 |
| June | 80% | 6.9 |
| July | 89% | 7.3 |
| August | 86% | 6.1 |
| September | 81% | 4.6 |
| October | 73% | 2.9 |
| November | 73% | 1.9 |
| December | 70% | 1.4 |
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 Brandenberg record?
A normal year at Brandenberg brings 7,253 heating degree days, 35% more than the median U.S. place (5,373), and 582 cooling degree days, 36% 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 2,433 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,304 | 0 |
| February | 1,082 | 0 |
| March | 887 | 0 |
| April | 581 | 0 |
| May | 317 | 10 |
| June | 91 | 72 |
| July | 13 | 243 |
| August | 27 | 208 |
| September | 185 | 45 |
| October | 570 | 3 |
| November | 935 | 0 |
| December | 1,263 | 0 |
| Year (annual) | 7,253 | 582 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00241084. 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.
Have recent years at Brandenberg been warmer than normal?
2025 averaged 46.9°F, 0.3°F above the 1991-2020 normal of 46.6°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.6°F | +1.0°F | 10.62 | 35.8 |
| 2022 | 45.3°F | −1.3°F | 17.24 | 60.1 |
| 2023 | 47.3°F | +0.7°F | 19.79 | 36.3 |
| 2024 | 47.9°F | +1.3°F | 15.72 | 29.4 |
| 2025 | 46.9°F | +0.3°F | 18.57 | 42.0 |
Over 62 complete years from 1957 to 2025, the station's annual mean temperature rose at a fitted 2.7°F per century (+0.15°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00241084; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Brandenberg's climate compare?
Brandenberg is warmer than 123 of the 141 places with their own NOAA record in Montana, and wetter than 82. Across the 7,247 U.S. stations with normals, its annual mean of 46.6°F is warmer than 26%.
In the Köppen classification computed from these normals, Brandenberg is BSk: cold semi-arid steppe. 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 Brandenberg share this climate record?
Ashland has no NOAA station with 1991-2020 normals of its 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.
- Ashland, MT956 people · 15 mi S
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 Brandenberg's climate
What is the coldest month at Brandenberg?
January, with a normal high of 35°F and a normal low of 11°F. The warmest is July (90°F by day, 55°F at night).
Does it snow at Brandenberg?
Yes: 40 inches in a normal year, falling on 28 days with 0.1 inch or more, the most in February (8.0 inches).
What is the rainiest month at Brandenberg?
May, with 3.12 in of precipitation in a normal year; the driest is November with 0.54 in.
What plant hardiness zone is Brandenberg in?
By the same method at the station, the coldest night of a typical year reaches −27°F (30 years, 1991-2020): zone 4a.
How late can frost come at Brandenberg?
In half of years the last 32°F night comes after May 18; in one year in ten it comes after May 30. Waiting until May 30 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Colstrip, MT20 miles from this station, 46.1°F a year
- Sonnette (7 mi SW), MT37 miles from this station, 44.8°F a year
- Forsyth, MT38 miles from this station, 46.7°F a year
- Busby, MT40 miles from this station, 45.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made