Biddle, Montana climate: Normal weather by month, frost dates and records
Biddle's normal year runs from 13°F January nights to 89°F July afternoons, with 15.3 inches of precipitation and 35 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.6°C, January lows of −10°C, July highs of 32°C, 387 mm of precipitation a year.
- NOAA stationBiddle (8 mi SW)
- Station IDUSC00240743
- Location45.04°N 105.48°W
- Elevation3,631 ft (1,107 m)
- Population (census place)33
On October 8, the normal high in Biddle is 65°F and the normal low 37°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Biddle.
- Jan 37° 13°
- Feb 39° 15°
- Mar 50° 24°
- Apr 59° 32°
- May 68° 41°
- Jun 79° 50°
- Jul 89° 57°
- Aug 88° 55°
- Sep 78° 46°
- Oct 61° 34°
- Nov 48° 23°
- Dec 37° 14°
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 Biddle each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (3.02 in), the least in December (0.37 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 37°F | 13°F | 24.9°F | 0.40 | 4.6 | 4 | <1 | 30 | 9 h 10 min |
| February | 39°F | 15°F | 27.1°F | 0.51 | 5.7 | 4 | <1 | 27 | 10 h 20 min |
| March | 50°F | 24°F | 36.8°F | 0.77 | 5.8 | 5 | <1 | 25 | 11 h 50 min |
| April | 59°F | 32°F | 45.0°F | 1.80 | 5.6 | 8 | <1 | 16 | 13 h 30 min |
| May | 68°F | 41°F | 54.6°F | 3.02 | 1.3 | 10 | <1 | 5 | 14 h 50 min |
| June | 79°F | 50°F | 64.6°F | 2.33 | 0.0 | 9 | 4 | <1 | 15 h 40 min |
| July | 89°F | 57°F | 73.2°F | 1.81 | 0.0 | 7 | 16 | <1 | 15 h 20 min |
| August | 88°F | 55°F | 71.8°F | 1.14 | 0.0 | 5 | 15 | <1 | 14 h 10 min |
| September | 78°F | 46°F | 61.8°F | 1.29 | 0.1 | 5 | 5 | 2 | 12 h 40 min |
| October | 61°F | 34°F | 47.5°F | 1.35 | 4.0 | 6 | <1 | 13 | 11 h |
| November | 48°F | 23°F | 35.3°F | 0.46 | 3.6 | 4 | <1 | 26 | 9 h 40 min |
| December | 37°F | 14°F | 25.8°F | 0.37 | 4.5 | 4 | <1 | 30 | 8 h 50 min |
| Year (annual) | 61°F | 34°F | 47.4°F | 15.25 | 35.2 | 72 | 40 | 173 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −10°C | −3.9°C | 10 mm | 12 cm |
| February | 4°C | −9°C | −2.7°C | 13 mm | 14 cm |
| March | 10°C | −5°C | 2.7°C | 20 mm | 15 cm |
| April | 15°C | 0°C | 7.2°C | 46 mm | 14 cm |
| May | 20°C | 5°C | 12.6°C | 77 mm | 3 cm |
| June | 26°C | 10°C | 18.1°C | 59 mm | 0 cm |
| July | 32°C | 14°C | 22.9°C | 46 mm | 0 cm |
| August | 31°C | 13°C | 22.1°C | 29 mm | 0 cm |
| September | 25°C | 8°C | 16.6°C | 33 mm | 0 cm |
| October | 16°C | 1°C | 8.6°C | 34 mm | 10 cm |
| November | 9°C | −5°C | 1.8°C | 12 mm | 9 cm |
| December | 3°C | −10°C | −3.4°C | 9 mm | 11 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00240743; 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 Biddle?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (5).
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 USC00240743.
When is the last frost in Biddle?
In Biddle, the last spring frost (32°F) comes after May 14 in half of years and after May 27 in one year in ten; the first autumn frost comes before September 28 in half of years and before September 13 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 141 year in 10 after May 27; 9 in 10 after May 2
- First autumn frost, half of years before
- September 281 year in 10 before September 13; 9 in 10 before October 12
NOAA puts the median frost-free season at 134 days, and the season without a hard freeze (28°F) at 154 days.
A hard freeze (28°F) comes after May 3 in half of springs and before October 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Biddle in zone 4b in ZIP code 59314, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Biddle's NOAA station is in zone 5a: the coldest night of a typical year reaches −19°F (25 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Montana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00240743; 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 Biddle?
In a normal year in Biddle, 40 days a year reach 90°F (5 of them 100°F or more), 173 nights fall to 32°F or colder and 72 days bring measurable precipitation.
- Days at 90°F or more
- 40a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 173a normal year
- Days that stay below freezing
- 38high of 32°F or less
- Days with 0.01 inch of precipitation
- 72a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1963) is 110°F, on July 27, 2021; the lowest is −43°F, on December 22, 1989.
The wettest calendar year on that record is 2008, with 21.83 in; the snowiest season is 2008–09, with 86.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00240743; records: ACIS (NOAA Regional Climate Centers), station USC00240743. Records use complete months only; a month missing more than three days is left out.
How sunny is Biddle?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Biddle, 4.2 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 1.9 |
| February | 77% | 2.9 |
| March | 73% | 3.9 |
| April | 71% | 4.9 |
| May | 73% | 5.9 |
| June | 81% | 6.9 |
| July | 89% | 7.3 |
| August | 87% | 6.1 |
| September | 82% | 4.6 |
| October | 74% | 3.0 |
| November | 74% | 2.0 |
| December | 71% | 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 much heating and cooling does Biddle need?
A normal year in Biddle brings 7,048 heating degree days, 31% more than the median U.S. place (5,373), and 662 cooling degree days, 27% 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 2,551 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,242 | 0 |
| February | 1,060 | 0 |
| March | 873 | 0 |
| April | 600 | 0 |
| May | 332 | 11 |
| June | 93 | 81 |
| July | 13 | 269 |
| August | 23 | 233 |
| September | 162 | 66 |
| October | 546 | 3 |
| November | 890 | 0 |
| December | 1,215 | 0 |
| Year (annual) | 7,048 | 662 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00240743. 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 Biddle been warmer than normal lately?
2022 averaged 46.9°F, 0.5°F below the 1991-2020 normal of 47.4°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 46.9°F | −0.5°F | 14.76 | 51.0 |
Over 44 complete years from 1966 to 2025, the station's annual mean temperature rose at a fitted 6.2°F per century (+0.35°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00240743; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Biddle's climate compare?
Biddle is warmer than 133 of the other 140 places with their own NOAA record in Montana, and wetter than 79. Across the 7,247 U.S. stations with normals, its annual mean of 47.4°F is warmer than 29%.
In the Köppen classification computed from these normals, Biddle 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.
Questions about Biddle's climate
What is the coldest month in Biddle?
January, with a normal high of 37°F and a normal low of 13°F. The warmest is July (89°F by day, 57°F at night).
Does it snow in Biddle?
Yes: 35 inches in a normal year, falling on 17 days with 0.1 inch or more, the most in March (5.8 inches).
What is the rainiest month in Biddle?
May, with 3.02 in of precipitation in a normal year; the driest is December with 0.37 in.
What plant hardiness zone is Biddle in?
The USDA's 2023 map puts Biddle in zone 4b in ZIP code 59314, the nearest ZIP area. By the same method at Biddle's NOAA station, the coldest night of a typical year reaches −19°F (25 years, 1991-2020): zone 5a.
How late can frost come in Biddle?
In half of years the last 32°F night comes after May 14; in one year in ten it comes after May 27. Waiting until May 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Moorhead (9 mi NE), MT16 miles from this station, 46.2°F a year
- Broadus, MT28 miles from this station, 48.2°F a year
- Sonnette (7 mi SW), MT29 miles from this station, 44.8°F a year
- Weston (1 mi E), WY29 miles from this station, 45.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made