East Glacier, Montana climate: Climate normals at a NOAA weather station
East Glacier's normal year runs from 13°F January nights to 74°F July afternoons, with 30.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 3.8°C, January lows of −10°C, July highs of 23°C, 773 mm of precipitation a year.
- NOAA stationEast Glacier
- Station IDUSC00242629
- Location48.45°N 113.22°W
- Elevation4,806 ft (1,465 m)
On October 22, the normal high in East Glacier is 47°F and the normal low 28°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for East Glacier.
- Jan 30° 13°
- Feb 31° 13°
- Mar 37° 19°
- Apr 46° 27°
- May 56° 34°
- Jun 64° 41°
- Jul 74° 46°
- Aug 74° 44°
- Sep 63° 38°
- Oct 50° 29°
- Nov 36° 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 East Glacier each month?
July is the warmest month, with normal highs of 74°F; January the coldest, with normal lows of 13°F. The most precipitation falls in June (4.00 in), the least in August (1.46 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 13°F | 21.7°F | 3.09 | – | <1 | 29 | 8 h 40 min |
| February | 31°F | 13°F | 21.8°F | 2.56 | – | <1 | 26 | 10 h 10 min |
| March | 37°F | 19°F | 28.0°F | 2.55 | – | <1 | 28 | 11 h 50 min |
| April | 46°F | 27°F | 36.1°F | 2.21 | – | <1 | 24 | 13 h 40 min |
| May | 56°F | 34°F | 44.9°F | 2.89 | – | <1 | 13 | 15 h 10 min |
| June | 64°F | 41°F | 52.7°F | 4.00 | – | <1 | 2 | 16 h |
| July | 74°F | 46°F | 59.9°F | 1.54 | – | 1 | <1 | 15 h 50 min |
| August | 74°F | 44°F | 59.2°F | 1.46 | – | 1 | 1 | 14 h 20 min |
| September | 63°F | 38°F | 50.5°F | 2.17 | – | <1 | 6 | 12 h 40 min |
| October | 50°F | 29°F | 39.6°F | 2.55 | – | <1 | 19 | 11 h |
| November | 36°F | 22°F | 29.0°F | 2.78 | – | <1 | 25 | 9 h 20 min |
| December | 29°F | 15°F | 21.9°F | 2.63 | – | <1 | 29 | 8 h 20 min |
| Year (annual) | 49°F | 28°F | 38.8°F | 30.43 | – | 2 | 201 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −10°C | −5.7°C | 78 mm |
| February | −1°C | −11°C | −5.7°C | 65 mm |
| March | 3°C | −7°C | −2.2°C | 65 mm |
| April | 8°C | −3°C | 2.3°C | 56 mm |
| May | 13°C | 1°C | 7.2°C | 73 mm |
| June | 18°C | 5°C | 11.5°C | 102 mm |
| July | 23°C | 8°C | 15.5°C | 39 mm |
| August | 23°C | 7°C | 15.1°C | 37 mm |
| September | 17°C | 3°C | 10.3°C | 55 mm |
| October | 10°C | −1°C | 4.2°C | 65 mm |
| November | 2°C | −6°C | −1.7°C | 71 mm |
| December | −1°C | −10°C | −5.6°C | 67 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00242629; 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 East Glacier?
Normal highs sit between 65°F and 85°F in July and August.
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 USC00242629.
When is the last frost at East Glacier?
In East Glacier, the last spring frost (32°F) comes after June 8 in half of years and after July 1 in one year in ten; the first autumn frost comes before September 5 in half of years and before August 20 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 81 year in 10 after July 1; 9 in 10 after May 24
- First autumn frost, half of years before
- September 51 year in 10 before August 20; 9 in 10 before September 20
NOAA puts the median frost-free season at 88 days, and the season without a hard freeze (28°F) at 122 days.
A hard freeze (28°F) comes after May 21 in half of springs and before September 23 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts East Glacier in zone 4a in ZIP code 59417, 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 USC00242629; 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 East Glacier?
In a normal year in East Glacier, 2 days a year reach 90°F and 201 nights fall to 32°F or colder.
- Days at 90°F or more
- 2a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 201a normal year
- Days that stay below freezing
- 60high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00242629.
How sunny is it at East Glacier?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds at East Glacier, 3.8 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.3 |
| February | 73% | 2.4 |
| March | 68% | 3.5 |
| April | 68% | 4.7 |
| May | 69% | 5.6 |
| June | 73% | 6.3 |
| July | 86% | 7.1 |
| August | 82% | 5.8 |
| September | 76% | 4.1 |
| October | 69% | 2.5 |
| November | 62% | 1.4 |
| December | 62% | 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 many heating and cooling degree days does East Glacier record?
A normal year at East Glacier brings 9,569 heating degree days, 78% more than the median U.S. place (5,373), and 39 cooling degree days, 96% 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 903 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,341 | 0 |
| February | 1,211 | 0 |
| March | 1,147 | 0 |
| April | 869 | 0 |
| May | 622 | 0 |
| June | 371 | 2 |
| July | 179 | 21 |
| August | 195 | 15 |
| September | 436 | 1 |
| October | 786 | 0 |
| November | 1,079 | 0 |
| December | 1,335 | 0 |
| Year (annual) | 9,569 | 39 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00242629. 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 East Glacier been warmer than normal?
2025 averaged 41.0°F, 2.2°F above the 1991-2020 normal of 38.8°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 41.0°F | +2.2°F | – |
Source: observed years: ACIS, station USC00242629. A year counts only with all twelve months complete.
How does East Glacier's climate compare?
East Glacier is warmer than 7 of the 141 places with their own NOAA record in Montana, and wetter than 129. Across the 7,247 U.S. stations with normals, its annual mean of 38.8°F is warmer than 4%.
In the Köppen classification computed from these normals, East Glacier 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 East Glacier share this climate record?
8 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.
- North Browning, MT2,894 people · 12 mi NE
- South Browning, MT1,852 people · 12 mi NE
- Browning, MT990 people · 12 mi NE
- Heart Butte, MT504 people · 21 mi SE
- Starr School, MT227 people · 11 mi N
- East Glacier Park Village, MT199 people · 0 mi S
- Blackfoot, MT95 people · 18 mi NE
- Snowslip, MT26 people · 16 mi SW
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 East Glacier's climate
What is the coldest month at East Glacier?
January, with a normal high of 30°F and a normal low of 13°F. The warmest is July (74°F by day, 46°F at night).
What is the rainiest month at East Glacier?
June, with 4.00 in of precipitation in a normal year; the driest is August with 1.46 in.
What plant hardiness zone is East Glacier in?
The USDA's 2023 map puts East Glacier in zone 4a in ZIP code 59417, the nearest ZIP area.
How late can frost come at East Glacier?
In half of years the last 32°F night comes after June 8; in one year in ten it comes after July 1. Waiting until July 1 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- St. Mary, MT22 miles from this station, 39.5°F a year
- West Glacier, MT35 miles from this station, 43.1°F a year
- Hungry Horse, MT37 miles from this station, 44.4°F a year
- Cut Bank, MT40 miles from this station, 41.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made