Melville (4 mi W), Montana climate: Climate normals at a NOAA weather station
Melville (4 mi W)'s normal year runs from 13°F December nights to 76°F July afternoons, with 19.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 4.7°C, December lows of −11°C, July highs of 24°C, 502 mm of precipitation a year.
- NOAA stationMelville (4 mi W)
- Station IDUSC00245603
- Location46.10°N 110.05°W
- Elevation5,365 ft (1,635 m)
On October 22, the normal high in Melville (4 mi W) is 50°F and the normal low 26°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Melville (4 mi W).
- Jan 35° 13°
- Feb 35° 13°
- Mar 42° 20°
- Apr 49° 26°
- May 58° 34°
- Jun 66° 42°
- Jul 76° 47°
- Aug 75° 45°
- Sep 66° 39°
- Oct 53° 29°
- Nov 41° 19°
- Dec 34° 13°
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 Melville (4 mi W) each month?
July is the warmest month, with normal highs of 76°F; December the coldest, with normal lows of 13°F. The most precipitation falls in May (3.59 in), the least in January (0.53 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 35°F | 13°F | 23.8°F | 0.53 | 5 | <1 | 29 | 9 h |
| February | 35°F | 13°F | 23.8°F | 0.65 | 6 | <1 | 27 | 10 h 20 min |
| March | 42°F | 20°F | 30.9°F | 1.08 | 7 | <1 | 27 | 11 h 50 min |
| April | 49°F | 26°F | 37.7°F | 2.47 | 11 | <1 | 22 | 13 h 30 min |
| May | 58°F | 34°F | 46.2°F | 3.59 | 13 | <1 | 11 | 15 h |
| June | 66°F | 42°F | 54.0°F | 3.54 | 13 | <1 | 2 | 15 h 40 min |
| July | 76°F | 47°F | 61.5°F | 1.92 | 11 | 1 | <1 | 15 h 30 min |
| August | 75°F | 45°F | 60.3°F | 1.38 | 9 | <1 | 1 | 14 h 10 min |
| September | 66°F | 39°F | 52.3°F | 1.66 | 8 | <1 | 5 | 12 h 40 min |
| October | 53°F | 29°F | 40.7°F | 1.52 | 8 | <1 | 18 | 11 h |
| November | 41°F | 19°F | 30.1°F | 0.84 | 6 | <1 | 25 | 9 h 30 min |
| December | 34°F | 13°F | 23.3°F | 0.60 | 5 | <1 | 29 | 8 h 40 min |
| Year (annual) | 53°F | 28°F | 40.4°F | 19.78 | 100 | 2 | 196 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 1°C | −11°C | −4.6°C | 13 mm |
| February | 2°C | −11°C | −4.6°C | 17 mm |
| March | 6°C | −7°C | −0.6°C | 27 mm |
| April | 10°C | −3°C | 3.2°C | 63 mm |
| May | 15°C | 1°C | 7.9°C | 91 mm |
| June | 19°C | 5°C | 12.2°C | 90 mm |
| July | 24°C | 8°C | 16.4°C | 49 mm |
| August | 24°C | 7°C | 15.7°C | 35 mm |
| September | 19°C | 4°C | 11.3°C | 42 mm |
| October | 12°C | −2°C | 4.8°C | 39 mm |
| November | 5°C | −7°C | −1.1°C | 21 mm |
| December | 1°C | −11°C | −4.8°C | 15 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Big Timber (19 miles away), gets 55 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00245603; 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 Melville (4 mi W)?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September has the fewest days with rain (8).
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 USC00245603.
When is the last frost at Melville (4 mi W)?
In Melville (4 mi W), the last spring frost (32°F) comes after June 9 in half of years and after June 27 in one year in ten; the first autumn frost comes before September 7 in half of years and before August 21 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 91 year in 10 after June 27; 9 in 10 after May 26
- First autumn frost, half of years before
- September 71 year in 10 before August 21; 9 in 10 before September 23
NOAA puts the median frost-free season at 88 days, and the season without a hard freeze (28°F) at 118 days.
A hard freeze (28°F) comes after May 24 in half of springs and before September 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Melville (4 mi W) in zone 5a in ZIP code 59011, 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 4b: the coldest night of a typical year reaches −24°F (30 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 USC00245603; 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 Melville (4 mi W)?
In a normal year in Melville (4 mi W), 2 days a year reach 90°F, 196 nights fall to 32°F or colder and 100 days bring measurable precipitation.
- 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
- 196a normal year
- Days that stay below freezing
- 42high of 32°F or less
- Days with 0.01 inch of precipitation
- 100a normal year
The highest temperature in this station's record (since 1961) is 101°F, on July 12, 2026; the lowest is −45°F, on February 3, 1989.
The wettest calendar year on that record is 2023, with 31.76 in; the snowiest season is 2017–18, with 140.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00245603; records: ACIS (NOAA Regional Climate Centers), station USC00245603. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Melville (4 mi W)?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds at Melville (4 mi W), 4.0 kWh per square metre a day. July is the sunniest month (85%) and December the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 1.7 |
| February | 76% | 2.8 |
| March | 72% | 3.9 |
| April | 68% | 4.8 |
| May | 69% | 5.7 |
| June | 74% | 6.5 |
| July | 85% | 7.2 |
| August | 84% | 6.0 |
| September | 78% | 4.4 |
| October | 71% | 2.8 |
| November | 66% | 1.7 |
| December | 64% | 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 Melville (4 mi W) record?
A normal year at Melville (4 mi W) brings 9,005 heating degree days, 68% more than the median U.S. place (5,373), and 51 cooling degree days, 94% 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 1,057 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,277 | 0 |
| February | 1,154 | 0 |
| March | 1,057 | 0 |
| April | 821 | 0 |
| May | 583 | 0 |
| June | 334 | 2 |
| July | 137 | 27 |
| August | 164 | 19 |
| September | 385 | 3 |
| October | 753 | 0 |
| November | 1,046 | 0 |
| December | 1,294 | 0 |
| Year (annual) | 9,005 | 51 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00245603. 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 Melville (4 mi W) been warmer than normal?
2025 averaged 42.6°F, 2.2°F above the 1991-2020 normal of 40.4°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 42.0°F | +1.6°F | 13.61 |
| 2022 | 40.8°F | +0.4°F | 18.57 |
| 2023 | 41.5°F | +1.1°F | 31.76 |
| 2024 | 42.9°F | +2.5°F | 15.18 |
| 2025 | 42.6°F | +2.2°F | 22.53 |
Over 61 complete years from 1962 to 2025, the station's annual mean temperature rose at a fitted 3.8°F per century (+0.21°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00245603; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Melville (4 mi W)'s climate compare?
Melville (4 mi W) is warmer than 19 of the 141 places with their own NOAA record in Montana, and wetter than 115. Across the 7,247 U.S. stations with normals, its annual mean of 40.4°F is warmer than 6%.
In the Köppen classification computed from these normals, Melville (4 mi W) 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.
Questions about Melville (4 mi W)'s climate
What is the coldest month at Melville (4 mi W)?
December, with a normal high of 34°F and a normal low of 13°F. The warmest is July (76°F by day, 47°F at night).
Does it snow at Melville (4 mi W)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Big Timber (19 miles away), records 55 inches of snow in a normal year.
What is the rainiest month at Melville (4 mi W)?
May, with 3.59 in of precipitation in a normal year; the driest is January with 0.53 in.
What plant hardiness zone is Melville (4 mi W) in?
The USDA's 2023 map puts Melville (4 mi W) in zone 5a in ZIP code 59011, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −24°F (30 years, 1991-2020): zone 4b.
How late can frost come at Melville (4 mi W)?
In half of years the last 32°F night comes after June 9; in one year in ten it comes after June 27. Waiting until June 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Big Timber, MT19 miles from this station, 47.0°F a year
- Harlowton, MT25 miles from this station, 43.8°F a year
- Gibson (2 mi NE), MT27 miles from this station, 43.8°F a year
- Wilsall, MT30 miles from this station, 41.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made