Mildred (5 mi N), Montana climate: Climate normals at a NOAA weather station
Mildred (5 mi N)'s normal year runs from 6°F January nights to 87°F July afternoons, with 14.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −15°C, July highs of 31°C, 364 mm of precipitation a year.
- NOAA stationMildred (5 mi N)
- Station IDUSC00245668
- Location46.76°N 104.96°W
- Elevation2,482 ft (757 m)
On October 22, the normal high in Mildred (5 mi N) is 56°F and the normal low 29°F, and the chance of measurable rain or snow is 14%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Mildred (5 mi N).
- Jan 29° 6°
- Feb 33° 9°
- Mar 46° 19°
- Apr 57° 29°
- May 67° 39°
- Jun 78° 50°
- Jul 87° 56°
- Aug 87° 53°
- Sep 76° 43°
- Oct 59° 31°
- Nov 44° 19°
- Dec 32° 10°
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 Mildred (5 mi N) each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 6°F. The most precipitation falls in May (2.83 in), the least in January (0.29 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 29°F | 6°F | 17.1°F | 0.29 | 4 | <1 | 30 | 9 h |
| February | 33°F | 9°F | 21.2°F | 0.33 | 3 | <1 | 27 | 10 h 20 min |
| March | 46°F | 19°F | 32.3°F | 0.57 | 4 | <1 | 28 | 11 h 50 min |
| April | 57°F | 29°F | 43.3°F | 1.54 | 6 | <1 | 19 | 13 h 30 min |
| May | 67°F | 39°F | 53.3°F | 2.83 | 9 | <1 | 7 | 15 h |
| June | 78°F | 50°F | 63.6°F | 2.30 | 8 | 3 | <1 | 15 h 50 min |
| July | 87°F | 56°F | 71.4°F | 2.03 | 7 | 14 | <1 | 15 h 30 min |
| August | 87°F | 53°F | 69.9°F | 1.26 | 5 | 13 | <1 | 14 h 20 min |
| September | 76°F | 43°F | 59.3°F | 1.35 | 5 | 4 | 3 | 12 h 40 min |
| October | 59°F | 31°F | 45.1°F | 1.15 | 5 | <1 | 17 | 11 h |
| November | 44°F | 19°F | 31.6°F | 0.37 | 3 | <1 | 28 | 9 h 30 min |
| December | 32°F | 10°F | 20.9°F | 0.30 | 3 | <1 | 31 | 8 h 30 min |
| Year (annual) | 58°F | 30°F | 44.1°F | 14.32 | 61 | 35 | 191 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −2°C | −15°C | −8.3°C | 7 mm |
| February | 1°C | −13°C | −6.0°C | 8 mm |
| March | 8°C | −7°C | 0.2°C | 14 mm |
| April | 14°C | −1°C | 6.3°C | 39 mm |
| May | 20°C | 4°C | 11.8°C | 72 mm |
| June | 25°C | 10°C | 17.6°C | 58 mm |
| July | 31°C | 13°C | 21.9°C | 52 mm |
| August | 30°C | 12°C | 21.1°C | 32 mm |
| September | 24°C | 6°C | 15.2°C | 34 mm |
| October | 15°C | 0°C | 7.3°C | 29 mm |
| November | 7°C | −7°C | −0.2°C | 9 mm |
| December | 0°C | −12°C | −6.2°C | 8 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Terry (16 miles away), gets 12 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00245668; 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 Mildred (5 mi N)?
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 USC00245668.
When is the last frost at Mildred (5 mi N)?
In Mildred (5 mi N), the last spring frost (32°F) comes after May 20 in half of years and after June 2 in one year in ten; the first autumn frost comes before September 22 in half of years and before September 7 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 201 year in 10 after June 2; 9 in 10 after May 6
- First autumn frost, half of years before
- September 221 year in 10 before September 7; 9 in 10 before October 6
NOAA puts the median frost-free season at 124 days, and the season without a hard freeze (28°F) at 145 days.
A hard freeze (28°F) comes after May 7 in half of springs and before October 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Mildred (5 mi N) in zone 4a in ZIP code 59326, 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 −27°F (27 complete years).
Frost dates for every NOAA station in Montana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00245668; 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 Mildred (5 mi N)?
In a normal year in Mildred (5 mi N), 35 days a year reach 90°F (4 of them 100°F or more), 191 nights fall to 32°F or colder and 61 days bring measurable precipitation.
- Days at 90°F or more
- 35a normal year
- Days at 100°F or more
- 4a normal year
- Nights at 32°F or colder
- 191a normal year
- Days that stay below freezing
- 57high of 32°F or less
- Days with 0.01 inch of precipitation
- 61a normal year
The highest temperature in this station's record (since 1979) is 113°F, on July 13, 2026; the lowest is −46°F, on December 22, 1989.
The wettest calendar year on that record is 2013, with 20.79 in; the snowiest season is 2022–23, with 70.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00245668; records: ACIS (NOAA Regional Climate Centers), station USC00245668. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Mildred (5 mi N)?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Mildred (5 mi N), 4.1 kWh per square metre a day. July is the sunniest month (88%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 1.7 |
| February | 78% | 2.8 |
| March | 74% | 3.9 |
| April | 72% | 5.0 |
| May | 73% | 5.9 |
| June | 80% | 6.8 |
| July | 88% | 7.2 |
| August | 86% | 6.0 |
| September | 80% | 4.4 |
| October | 74% | 2.9 |
| November | 74% | 1.9 |
| December | 70% | 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 Mildred (5 mi N) record?
A normal year at Mildred (5 mi N) brings 8,119 heating degree days, 51% more than the median U.S. place (5,373), and 538 cooling degree days, 41% 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 2,279 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,485 | 0 |
| February | 1,225 | 0 |
| March | 1,014 | 0 |
| April | 651 | 0 |
| May | 371 | 9 |
| June | 112 | 70 |
| July | 22 | 220 |
| August | 39 | 191 |
| September | 216 | 45 |
| October | 618 | 3 |
| November | 1,002 | 0 |
| December | 1,365 | 0 |
| Year (annual) | 8,119 | 538 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00245668. 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 Mildred (5 mi N) been warmer than normal?
2025 averaged 47.1°F, 3.0°F above the 1991-2020 normal of 44.1°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 47.1°F | +3.0°F | 14.11 |
Over 80 complete years from 1919 to 2025, the station's annual mean temperature rose at a fitted 3.6°F per century (+0.20°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00245668; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Mildred (5 mi N)'s climate compare?
Mildred (5 mi N) is warmer than 76 of the 141 places with their own NOAA record in Montana, and wetter than 54. Across the 7,247 U.S. stations with normals, its annual mean of 44.1°F is warmer than 16%.
In the Köppen classification computed from these normals, Mildred (5 mi N) 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 Mildred (5 mi N)'s climate
What is the coldest month at Mildred (5 mi N)?
January, with a normal high of 29°F and a normal low of 6°F. The warmest is July (87°F by day, 56°F at night).
Does it snow at Mildred (5 mi N)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Terry (16 miles away), records 12 inches of snow in a normal year.
What is the rainiest month at Mildred (5 mi N)?
May, with 2.83 in of precipitation in a normal year; the driest is January with 0.29 in.
What plant hardiness zone is Mildred (5 mi N) in?
The USDA's 2023 map puts Mildred (5 mi N) in zone 4a in ZIP code 59326, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −27°F (27 years, 1991-2020): zone 4a.
How late can frost come at Mildred (5 mi N)?
In half of years the last 32°F night comes after May 20; in one year in ten it comes after June 2. Waiting until June 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Terry, MT16 miles from this station, 45.3°F a year
- Glendive, MT27 miles from this station, 46.6°F a year
- Carlyle (13 mi NW), MT31 miles from this station, 43.2°F a year
- Plevna, MT32 miles from this station, 44.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made