Rogers Pass (9 mi NNE), Montana climate: Climate normals at a NOAA weather station
Rogers Pass (9 mi NNE)'s normal year runs from 18°F December nights to 82°F July afternoons, with 17.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.6°C, December lows of −8°C, July highs of 28°C, 434 mm of precipitation a year.
- NOAA stationRogers Pass (9 mi NNE)
- Station IDUSC00247159
- Location47.19°N 112.29°W
- Elevation4,200 ft (1,280 m)
On October 22, the normal high in Rogers Pass (9 mi NNE) is 52°F and the normal low 31°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rogers Pass (9 mi NNE).
- Jan 36° 17°
- Feb 37° 16°
- Mar 45° 23°
- Apr 53° 30°
- May 62° 38°
- Jun 71° 46°
- Jul 82° 51°
- Aug 81° 49°
- Sep 70° 41°
- Oct 55° 32°
- Nov 42° 25°
- Dec 34° 18°
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 Rogers Pass (9 mi NNE) each month?
July is the warmest month, with normal highs of 82°F; December the coldest, with normal lows of 18°F. The most precipitation falls in June (3.06 in), the least in January (0.64 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 17°F | 26.5°F | 0.64 | 7 | <1 | 25 | 8 h 50 min |
| February | 37°F | 16°F | 26.5°F | 0.75 | 8 | <1 | 25 | 10 h 20 min |
| March | 45°F | 23°F | 34.2°F | 0.88 | 7 | <1 | 25 | 11 h 50 min |
| April | 53°F | 30°F | 41.5°F | 1.77 | 9 | <1 | 18 | 13 h 30 min |
| May | 62°F | 38°F | 50.3°F | 2.99 | 10 | <1 | 7 | 15 h |
| June | 71°F | 46°F | 58.1°F | 3.06 | 10 | 1 | 1 | 15 h 50 min |
| July | 82°F | 51°F | 66.0°F | 1.23 | 6 | 6 | <1 | 15 h 30 min |
| August | 81°F | 49°F | 64.8°F | 1.24 | 7 | 5 | 1 | 14 h 20 min |
| September | 70°F | 41°F | 55.4°F | 1.65 | 6 | 1 | 5 | 12 h 40 min |
| October | 55°F | 32°F | 43.7°F | 1.37 | 7 | <1 | 15 | 11 h |
| November | 42°F | 25°F | 33.3°F | 0.75 | 6 | <1 | 21 | 9 h 20 min |
| December | 34°F | 18°F | 26.0°F | 0.76 | 7 | <1 | 27 | 8 h 30 min |
| Year (annual) | 56°F | 32°F | 43.9°F | 17.09 | 88 | 12 | 169 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −8°C | −3.1°C | 16 mm |
| February | 3°C | −9°C | −3.1°C | 19 mm |
| March | 7°C | −5°C | 1.2°C | 22 mm |
| April | 12°C | −1°C | 5.3°C | 45 mm |
| May | 17°C | 4°C | 10.2°C | 76 mm |
| June | 21°C | 8°C | 14.5°C | 78 mm |
| July | 28°C | 10°C | 18.9°C | 31 mm |
| August | 27°C | 9°C | 18.2°C | 31 mm |
| September | 21°C | 5°C | 13.0°C | 42 mm |
| October | 13°C | 0°C | 6.5°C | 35 mm |
| November | 6°C | −4°C | 0.7°C | 19 mm |
| December | 1°C | −8°C | −3.3°C | 19 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Holter Dam (19 miles away), gets 28 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00247159; 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 Rogers Pass (9 mi NNE)?
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 USC00247159.
When is the last frost at Rogers Pass (9 mi NNE)?
In Rogers Pass (9 mi NNE), the last spring frost (32°F) comes after May 21 in half of years and after June 8 in one year in ten; the first autumn frost comes before September 15 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
- May 211 year in 10 after June 8; 9 in 10 after May 7
- First autumn frost, half of years before
- September 151 year in 10 before August 30; 9 in 10 before September 29
NOAA puts the median frost-free season at 115 days, and the season without a hard freeze (28°F) at 143 days.
A hard freeze (28°F) comes after May 7 in half of springs and before September 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rogers Pass (9 mi NNE) in zone 4b in ZIP code 59648, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 4a: the coldest night of a typical year reaches −28°F (19 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 USC00247159; 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 at Rogers Pass (9 mi NNE)?
In a normal year in Rogers Pass (9 mi NNE), 12 days a year reach 90°F, 169 nights fall to 32°F or colder and 88 days bring measurable precipitation.
- Days at 90°F or more
- 12a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 169a normal year
- Days that stay below freezing
- 40high of 32°F or less
- Days with 0.01 inch of precipitation
- 88a normal year
The highest temperature in this station's record (since 1964) is 100°F, on July 10, 1973; the lowest is −40°F, on March 4, 2019.
The wettest calendar year on that record is 1975, with 31.37 in; the snowiest season is 1982–83, with 158.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00247159; records: ACIS (NOAA Regional Climate Centers), station USC00247159. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Rogers Pass (9 mi NNE)?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds at Rogers Pass (9 mi NNE), 3.9 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.4 |
| February | 69% | 2.4 |
| March | 66% | 3.5 |
| April | 66% | 4.6 |
| May | 67% | 5.6 |
| June | 73% | 6.4 |
| July | 87% | 7.3 |
| August | 83% | 5.9 |
| September | 77% | 4.3 |
| October | 69% | 2.6 |
| November | 61% | 1.5 |
| December | 60% | 1.1 |
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 Rogers Pass (9 mi NNE) record?
A normal year at Rogers Pass (9 mi NNE) brings 7,894 heating degree days, 47% more than the median U.S. place (5,373), and 218 cooling degree days, 76% fewer than the median (908). Nine months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,619 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,194 | 0 |
| February | 1,078 | 0 |
| March | 956 | 0 |
| April | 704 | 0 |
| May | 457 | 3 |
| June | 225 | 16 |
| July | 69 | 100 |
| August | 90 | 84 |
| September | 303 | 14 |
| October | 660 | 1 |
| November | 950 | 0 |
| December | 1,210 | 0 |
| Year (annual) | 7,894 | 218 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00247159. 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 Rogers Pass (9 mi NNE) been warmer than normal?
2021 averaged 43.8°F, 0.1°F below the 1991-2020 normal of 43.9°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.8°F | −0.1°F | 13.22 |
Source: observed years: ACIS, station USC00247159. A year counts only with all twelve months complete.
How does Rogers Pass (9 mi NNE)'s climate compare?
Rogers Pass (9 mi NNE) is warmer than 71 of the 141 places with their own NOAA record in Montana, and wetter than 105. Across the 7,247 U.S. stations with normals, its annual mean of 43.9°F is warmer than 15%.
In the Köppen classification computed from these normals, Rogers Pass (9 mi NNE) 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 Rogers Pass (9 mi NNE) share this climate record?
Milford Colony 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.
- Milford Colony, MT0 people · 10 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 Rogers Pass (9 mi NNE)'s climate
What is the coldest month at Rogers Pass (9 mi NNE)?
December, with a normal high of 34°F and a normal low of 18°F. The warmest is July (82°F by day, 51°F at night).
Does it snow at Rogers Pass (9 mi NNE)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Holter Dam (19 miles away), records 28 inches of snow in a normal year.
What is the rainiest month at Rogers Pass (9 mi NNE)?
June, with 3.06 in of precipitation in a normal year; the driest is January with 0.64 in.
What plant hardiness zone is Rogers Pass (9 mi NNE) in?
The USDA's 2023 map puts Rogers Pass (9 mi NNE) in zone 4b in ZIP code 59648, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −28°F (19 years, 1991-2020): zone 4a.
How late can frost come at Rogers Pass (9 mi NNE)?
In half of years the last 32°F night comes after May 21; in one year in ten it comes after June 8. Waiting until June 8 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Holter Dam, MT19 miles from this station, 46.8°F a year
- Augusta, MT22 miles from this station, 45.4°F a year
- Lincoln, MT24 miles from this station, 41.0°F a year
- Cascade, MT27 miles from this station, 47.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made