Ingomar (9 mi E), Montana climate: Climate normals at a NOAA weather station
Ingomar (9 mi E)'s normal year runs from 4°F January nights to 88°F July afternoons, with 13.6 inches of precipitation and 30 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.8°C, January lows of −15°C, July highs of 31°C, 344 mm of precipitation a year.
- NOAA stationIngomar (9 mi E)
- Station IDUSC00244386
- Location46.57°N 107.19°W
- Elevation2,800 ft (853 m)
On October 22, the normal high in Ingomar (9 mi E) is 56°F and the normal low 27°F, and the chance of measurable rain or snow is 15%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ingomar (9 mi E).
- Jan 32° 4°
- Feb 36° 9°
- Mar 48° 19°
- Apr 58° 29°
- May 68° 39°
- Jun 78° 48°
- Jul 88° 55°
- Aug 88° 52°
- Sep 76° 42°
- Oct 59° 29°
- Nov 45° 17°
- Dec 34° 7°
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 Ingomar (9 mi E) each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 4°F. The most precipitation falls in May (2.56 in), the least in February (0.41 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 4°F | 18.1°F | 0.44 | 6.5 | 5 | <1 | 31 | 9 h |
| February | 36°F | 9°F | 22.7°F | 0.41 | 4.9 | 5 | <1 | 27 | 10 h 20 min |
| March | 48°F | 19°F | 33.7°F | 0.66 | 4.4 | 6 | <1 | 28 | 11 h 50 min |
| April | 58°F | 29°F | 43.7°F | 1.55 | 1.9 | 7 | <1 | 17 | 13 h 30 min |
| May | 68°F | 39°F | 53.5°F | 2.56 | 0.9 | 9 | <1 | 5 | 15 h |
| June | 78°F | 48°F | 63.2°F | 2.30 | 0.0 | 9 | 4 | <1 | 15 h 50 min |
| July | 88°F | 55°F | 71.6°F | 1.41 | 0.0 | 6 | 15 | <1 | 15 h 30 min |
| August | 88°F | 52°F | 69.8°F | 1.02 | 0.0 | 4 | 15 | <1 | 14 h 20 min |
| September | 76°F | 42°F | 58.7°F | 1.10 | 0.0 | 5 | 4 | 3 | 12 h 40 min |
| October | 59°F | 29°F | 44.2°F | 1.19 | 1.7 | 5 | <1 | 18 | 11 h |
| November | 45°F | 17°F | 31.0°F | 0.50 | 3.9 | 4 | <1 | 28 | 9 h 30 min |
| December | 34°F | 7°F | 20.7°F | 0.41 | 5.7 | 4 | <1 | 31 | 8 h 40 min |
| Year (annual) | 59°F | 29°F | 44.2°F | 13.55 | 29.9 | 68 | 38 | 187 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −15°C | −7.7°C | 11 mm | 17 cm |
| February | 2°C | −13°C | −5.2°C | 10 mm | 12 cm |
| March | 9°C | −7°C | 0.9°C | 17 mm | 11 cm |
| April | 15°C | −2°C | 6.5°C | 39 mm | 5 cm |
| May | 20°C | 4°C | 11.9°C | 65 mm | 2 cm |
| June | 26°C | 9°C | 17.3°C | 58 mm | 0 cm |
| July | 31°C | 13°C | 22.0°C | 36 mm | 0 cm |
| August | 31°C | 11°C | 21.0°C | 26 mm | 0 cm |
| September | 24°C | 5°C | 14.8°C | 28 mm | 0 cm |
| October | 15°C | −1°C | 6.8°C | 30 mm | 4 cm |
| November | 7°C | −9°C | −0.6°C | 13 mm | 10 cm |
| December | 1°C | −14°C | −6.3°C | 10 mm | 14 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00244386; 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 Ingomar (9 mi E)?
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 USC00244386.
When is the last frost at Ingomar (9 mi E)?
In Ingomar (9 mi E), the last spring frost (32°F) comes after May 21 in half of years and after June 4 in one year in ten; the first autumn frost comes before September 19 in half of years and before September 6 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 4; 9 in 10 after May 8
- First autumn frost, half of years before
- September 191 year in 10 before September 6; 9 in 10 before October 2
NOAA puts the median frost-free season at 120 days, and the season without a hard freeze (28°F) at 139 days.
A hard freeze (28°F) comes after May 10 in half of springs and before September 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Ingomar (9 mi E) in zone 4b in ZIP code 59039, 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 3b: the coldest night of a typical year reaches −31°F (23 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 USC00244386; 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 Ingomar (9 mi E)?
In a normal year in Ingomar (9 mi E), 38 days a year reach 90°F (5 of them 100°F or more), 187 nights fall to 32°F or colder and 68 days bring measurable precipitation.
- Days at 90°F or more
- 38a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 187a normal year
- Days that stay below freezing
- 44high of 32°F or less
- Days with 0.01 inch of precipitation
- 68a normal year
- Days with 1 inch of snow or more
- 14a normal year
The highest temperature in this station's record (since 1956) is 116°F, on July 13, 2026; the lowest is −54°F, on December 22, 1989.
The wettest calendar year on that record is 2019, with 21.35 in; the snowiest season is 1978–79, with 72.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00244386; records: ACIS (NOAA Regional Climate Centers), station USC00244386. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Ingomar (9 mi E)?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Ingomar (9 mi E), 4.1 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 1.6 |
| February | 73% | 2.6 |
| March | 70% | 3.6 |
| April | 71% | 4.9 |
| May | 74% | 6.0 |
| June | 80% | 6.8 |
| July | 89% | 7.2 |
| August | 87% | 6.0 |
| September | 81% | 4.4 |
| October | 74% | 2.9 |
| November | 73% | 1.8 |
| December | 66% | 1.3 |
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 Ingomar (9 mi E) record?
A normal year at Ingomar (9 mi E) brings 8,037 heating degree days, 50% more than the median U.S. place (5,373), and 503 cooling degree days, 45% 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 2,213 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,455 | 0 |
| February | 1,184 | 0 |
| March | 970 | 0 |
| April | 639 | 0 |
| May | 361 | 6 |
| June | 114 | 60 |
| July | 18 | 221 |
| August | 36 | 185 |
| September | 220 | 31 |
| October | 644 | 1 |
| November | 1,020 | 0 |
| December | 1,375 | 0 |
| Year (annual) | 8,037 | 503 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00244386. 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 Ingomar (9 mi E) been warmer than normal?
2025 averaged 45.8°F, 1.6°F above the 1991-2020 normal of 44.2°F. 3 of the 4 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 43.5°F | −0.7°F | 15.34 | 30.3 |
| 2023 | 46.8°F | +2.6°F | 17.51 | 13.1 |
| 2024 | 46.6°F | +2.4°F | 14.19 | 20.0 |
| 2025 | 45.8°F | +1.6°F | 16.98 | 26.6 |
Over 44 complete years from 1960 to 2025, the station's annual mean temperature rose at a fitted 5.0°F per century (+0.28°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00244386; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Ingomar (9 mi E)'s climate compare?
Ingomar (9 mi E) is warmer than 77 of the 141 places with their own NOAA record in Montana, and wetter than 45. Across the 7,247 U.S. stations with normals, its annual mean of 44.2°F is warmer than 16%.
In the Köppen classification computed from these normals, Ingomar (9 mi E) 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 Ingomar (9 mi E)'s climate
What is the coldest month at Ingomar (9 mi E)?
January, with a normal high of 32°F and a normal low of 4°F. The warmest is July (88°F by day, 55°F at night).
Does it snow at Ingomar (9 mi E)?
Yes: 30 inches in a normal year, falling on 20 days with 0.1 inch or more, the most in January (6.5 inches).
What is the rainiest month at Ingomar (9 mi E)?
May, with 2.56 in of precipitation in a normal year; the driest is February with 0.41 in.
What plant hardiness zone is Ingomar (9 mi E) in?
The USDA's 2023 map puts Ingomar (9 mi E) in zone 4b in ZIP code 59039, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −31°F (23 years, 1991-2020): zone 3b.
How late can frost come at Ingomar (9 mi E)?
In half of years the last 32°F night comes after May 21; in one year in ten it comes after June 4. Waiting until June 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Hysham, MT19 miles from this station, 47.2°F a year
- Forsyth, MT32 miles from this station, 46.7°F a year
- Melstone, MT32 miles from this station, 47.2°F a year
- Mosby (4 mi ENE), MT43 miles from this station, 48.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made