Libby (32 mi SSE), Montana climate: Climate normals at a NOAA weather station
Libby (32 mi SSE)'s normal year runs from 15°F December nights to 78°F July afternoons, with 22.3 inches of precipitation and 93 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 4.6°C, December lows of −9°C, July highs of 26°C, 567 mm of precipitation a year.
- NOAA stationLibby (32 mi SSE)
- Station IDUSC00245020
- Location47.96°N 115.21°W
- Elevation3,440 ft (1,049 m)
On October 14, the normal high in Libby (32 mi SSE) is 53°F and the normal low 28°F, and the chance of measurable rain or snow is 36%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Libby (32 mi SSE).
- Jan 30° 15°
- Feb 35° 15°
- Mar 43° 22°
- Apr 53° 28°
- May 62° 34°
- Jun 69° 40°
- Jul 78° 42°
- Aug 78° 40°
- Sep 67° 34°
- Oct 52° 27°
- Nov 37° 22°
- Dec 29° 15°
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 Libby (32 mi SSE) each month?
July is the warmest month, with normal highs of 78°F; December the coldest, with normal lows of 15°F. The most precipitation falls in November (2.94 in), the least in July (0.78 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 30°F | 15°F | 22.7°F | 2.12 | 17.7 | 15 | <1 | 30 | 8 h 50 min |
| February | 35°F | 15°F | 24.9°F | 1.84 | 14.2 | 11 | <1 | 27 | 10 h 10 min |
| March | 43°F | 22°F | 32.5°F | 2.17 | 14.6 | 14 | <1 | 29 | 11 h 50 min |
| April | 53°F | 28°F | 40.1°F | 1.62 | 5.2 | 12 | <1 | 25 | 13 h 40 min |
| May | 62°F | 34°F | 48.4°F | 2.09 | 0.5 | 12 | <1 | 14 | 15 h 10 min |
| June | 69°F | 40°F | 54.0°F | 1.98 | 0.2 | 10 | <1 | 7 | 16 h |
| July | 78°F | 42°F | 59.8°F | 0.78 | 0.0 | 6 | 2 | 3 | 15 h 40 min |
| August | 78°F | 40°F | 58.7°F | 0.84 | 0.0 | 5 | 2 | 6 | 14 h 20 min |
| September | 67°F | 34°F | 50.6°F | 1.19 | 0.0 | 7 | <1 | 17 | 12 h 40 min |
| October | 52°F | 27°F | 39.5°F | 2.15 | 3.0 | 12 | <1 | 23 | 11 h |
| November | 37°F | 22°F | 29.4°F | 2.94 | 15.4 | 15 | <1 | 27 | 9 h 20 min |
| December | 29°F | 15°F | 22.1°F | 2.59 | 21.9 | 15 | <1 | 30 | 8 h 20 min |
| Year (annual) | 53°F | 28°F | 40.2°F | 22.31 | 92.7 | 134 | 5 | 239 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −9°C | −5.2°C | 54 mm | 45 cm |
| February | 2°C | −9°C | −3.9°C | 47 mm | 36 cm |
| March | 6°C | −6°C | 0.3°C | 55 mm | 37 cm |
| April | 11°C | −2°C | 4.5°C | 41 mm | 13 cm |
| May | 17°C | 1°C | 9.1°C | 53 mm | 1 cm |
| June | 20°C | 4°C | 12.2°C | 50 mm | 1 cm |
| July | 26°C | 5°C | 15.4°C | 20 mm | 0 cm |
| August | 25°C | 4°C | 14.8°C | 21 mm | 0 cm |
| September | 20°C | 1°C | 10.3°C | 30 mm | 0 cm |
| October | 11°C | −3°C | 4.2°C | 55 mm | 8 cm |
| November | 3°C | −6°C | −1.4°C | 75 mm | 39 cm |
| December | −2°C | −9°C | −5.5°C | 66 mm | 56 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00245020; 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 Libby (32 mi SSE)?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August 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 USC00245020.
How hot and how cold does it get at Libby (32 mi SSE)?
In a normal year in Libby (32 mi SSE), 5 days a year reach 90°F, 239 nights fall to 32°F or colder and 134 days bring measurable precipitation.
- Days at 90°F or more
- 5a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 239a normal year
- Days that stay below freezing
- 47high of 32°F or less
- Days with 0.01 inch of precipitation
- 134a normal year
- Days with 1 inch of snow or more
- 30a normal year
The highest temperature in this station's record (since 1910) is 102°F, on August 4, 1961; the lowest is −44°F, on January 30, 1950.
The wettest calendar year on that record is 1972, with 34.12 in; the snowiest season is 1996–97, with 210.9 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00245020; records: ACIS (NOAA Regional Climate Centers), station USC00245020. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Libby (32 mi SSE)?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Libby (32 mi SSE), 3.7 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (51%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 54% | 1.1 |
| February | 60% | 2.0 |
| March | 62% | 3.2 |
| April | 66% | 4.5 |
| May | 69% | 5.6 |
| June | 71% | 6.2 |
| July | 87% | 7.3 |
| August | 84% | 6.0 |
| September | 77% | 4.2 |
| October | 66% | 2.5 |
| November | 54% | 1.3 |
| December | 51% | 0.9 |
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 Libby (32 mi SSE) record?
A normal year at Libby (32 mi SSE) brings 9,042 heating degree days, 68% more than the median U.S. place (5,373), and 27 cooling degree days, 97% 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 882 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,313 | 0 |
| February | 1,123 | 0 |
| March | 1,009 | 0 |
| April | 747 | 0 |
| May | 516 | 0 |
| June | 332 | 2 |
| July | 177 | 15 |
| August | 206 | 9 |
| September | 432 | 0 |
| October | 789 | 0 |
| November | 1,067 | 0 |
| December | 1,331 | 0 |
| Year (annual) | 9,042 | 27 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00245020. 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 Libby (32 mi SSE) been warmer than normal?
Over 54 complete years from 1950 to 2020, the station's annual mean temperature rose at a fitted 3.9°F per century (+0.21°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Libby (32 mi SSE)'s climate compare?
Libby (32 mi SSE) is warmer than 16 of the 141 places with their own NOAA record in Montana, and wetter than 121. Across the 7,247 U.S. stations with normals, its annual mean of 40.2°F is warmer than 6%.
In the Köppen classification computed from these normals, Libby (32 mi SSE) is Dsb: continental, dry-summer, 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 Libby (32 mi SSE) share this climate record?
Happys Inn 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.
- Happys Inn, MT146 people · 8 mi NE
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 Libby (32 mi SSE)'s climate
What is the coldest month at Libby (32 mi SSE)?
December, with a normal high of 29°F and a normal low of 15°F. The warmest is July (78°F by day, 42°F at night).
Does it snow at Libby (32 mi SSE)?
Yes: 93 inches in a normal year, falling on 64 days with 0.1 inch or more, the most in December (21.9 inches).
What is the rainiest month at Libby (32 mi SSE)?
November, with 2.94 in of precipitation in a normal year; the driest is July with 0.78 in.
What plant hardiness zone is Libby (32 mi SSE) in?
By the same method at the station, the coldest night of a typical year reaches −24°F (26 years, 1991-2020): zone 4b.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Trout Creek, MT20 miles from this station, 46.1°F a year
- Thompson Falls, MT26 miles from this station, 47.7°F a year
- Libby Dam (Base), MT32 miles from this station, 46.4°F a year
- Libby, MT33 miles from this station, 45.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made