Denton, Montana climate: Normal weather by month, frost dates and records
Denton's normal year runs from 9°F January nights to 83°F July afternoons, with 15.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.0°C, January lows of −13°C, July highs of 29°C, 401 mm of precipitation a year.
- NOAA stationDenton
- Station IDUSC00242347
- Location47.32°N 109.94°W
- Elevation3,610 ft (1,100 m)
- Population212
On October 22, the normal high in Denton is 55°F and the normal low 25°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Denton.
- Jan 36° 9°
- Feb 37° 11°
- Mar 46° 19°
- Apr 55° 28°
- May 65° 37°
- Jun 73° 44°
- Jul 83° 49°
- Aug 83° 48°
- Sep 72° 39°
- Oct 58° 28°
- Nov 45° 18°
- Dec 36° 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 in Denton each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 9°F. The most precipitation falls in June (2.88 in), the least in January (0.39 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 9°F | 22.3°F | 0.39 | 5 | <1 | 29 | 8 h 50 min |
| February | 37°F | 11°F | 24.3°F | 0.54 | 6 | <1 | 27 | 10 h 10 min |
| March | 46°F | 19°F | 32.5°F | 0.68 | 7 | <1 | 29 | 11 h 50 min |
| April | 55°F | 28°F | 41.3°F | 1.66 | 8 | <1 | 23 | 13 h 30 min |
| May | 65°F | 37°F | 50.9°F | 2.83 | 10 | <1 | 11 | 15 h |
| June | 73°F | 44°F | 58.7°F | 2.88 | 11 | 1 | 1 | 15 h 50 min |
| July | 83°F | 49°F | 66.3°F | 1.73 | 7 | 8 | <1 | 15 h 40 min |
| August | 83°F | 48°F | 65.0°F | 1.46 | 7 | 8 | 1 | 14 h 20 min |
| September | 72°F | 39°F | 55.3°F | 1.31 | 6 | 2 | 7 | 12 h 40 min |
| October | 58°F | 28°F | 42.8°F | 1.23 | 6 | <1 | 21 | 11 h |
| November | 45°F | 18°F | 31.2°F | 0.63 | 5 | <1 | 27 | 9 h 20 min |
| December | 36°F | 10°F | 22.8°F | 0.45 | 5 | <1 | 29 | 8 h 30 min |
| Year (annual) | 57°F | 28°F | 42.8°F | 15.79 | 82 | 19 | 204 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −13°C | −5.4°C | 10 mm |
| February | 3°C | −12°C | −4.3°C | 14 mm |
| March | 8°C | −7°C | 0.3°C | 17 mm |
| April | 13°C | −2°C | 5.2°C | 42 mm |
| May | 18°C | 3°C | 10.5°C | 72 mm |
| June | 23°C | 7°C | 14.8°C | 73 mm |
| July | 29°C | 10°C | 19.1°C | 44 mm |
| August | 28°C | 9°C | 18.3°C | 37 mm |
| September | 22°C | 4°C | 12.9°C | 33 mm |
| October | 14°C | −2°C | 6.0°C | 31 mm |
| November | 7°C | −8°C | −0.4°C | 16 mm |
| December | 2°C | −12°C | −5.1°C | 11 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Moccasin (18 miles away), gets 45 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00242347; 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.
When is the best weather to visit Denton?
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 USC00242347.
When is the last frost in Denton?
In Denton, the last spring frost (32°F) comes after June 1 in half of years and after June 26 in one year in ten; the first autumn frost comes before September 11 in half of years and before August 29 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 11 year in 10 after June 26; 9 in 10 after May 15
- First autumn frost, half of years before
- September 111 year in 10 before August 29; 9 in 10 before September 25
NOAA puts the median frost-free season at 101 days, and the season without a hard freeze (28°F) at 128 days.
A hard freeze (28°F) comes after May 14 in half of springs and before September 23 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Denton in zone 4b in ZIP code 59424, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Denton's NOAA station is in zone 4a: the coldest night of a typical year reaches −30°F (15 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 USC00242347; 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 in Denton?
In a normal year in Denton, 19 days a year reach 90°F (1 of them 100°F or more), 204 nights fall to 32°F or colder and 82 days bring measurable precipitation.
- Days at 90°F or more
- 19a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 204a normal year
- Days that stay below freezing
- 39high of 32°F or less
- Days with 0.01 inch of precipitation
- 82a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00242347.
How sunny is Denton?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Denton, 4.0 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 1.6 |
| February | 75% | 2.6 |
| March | 72% | 3.7 |
| April | 70% | 4.8 |
| May | 72% | 5.8 |
| June | 77% | 6.6 |
| July | 87% | 7.1 |
| August | 85% | 5.9 |
| September | 79% | 4.3 |
| October | 73% | 2.7 |
| November | 71% | 1.7 |
| December | 67% | 1.2 |
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 much heating and cooling does Denton need?
A normal year in Denton brings 8,278 heating degree days, 54% more than the median U.S. place (5,373), and 216 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 1,627 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,324 | 0 |
| February | 1,141 | 0 |
| March | 1,006 | 0 |
| April | 711 | 0 |
| May | 438 | 3 |
| June | 206 | 17 |
| July | 60 | 102 |
| August | 80 | 82 |
| September | 303 | 12 |
| October | 687 | 0 |
| November | 1,014 | 0 |
| December | 1,308 | 0 |
| Year (annual) | 8,278 | 216 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00242347. 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.
How does Denton's climate compare?
Denton is warmer than 43 of the other 140 places with their own NOAA record in Montana, and wetter than 90. Across the 7,247 U.S. stations with normals, its annual mean of 42.8°F is warmer than 12%.
In the Köppen classification computed from these normals, Denton 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 Denton share this climate record?
3 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.
- Coffee Creek, MT47 people · 7 mi W
- Deerfield Colony, MT20 people · 13 mi E
- Danvers, MT6 people · 12 mi SE
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 Denton's climate
What is the coldest month in Denton?
January, with a normal high of 36°F and a normal low of 9°F. The warmest is July (83°F by day, 49°F at night).
Does it snow in Denton?
Yes. NOAA publishes no 1991-2020 snowfall normal for Denton's NOAA station; the nearest record that keeps one, Moccasin (18 miles away), records 45 inches of snow in a normal year.
What is the rainiest month in Denton?
June, with 2.88 in of precipitation in a normal year; the driest is January with 0.39 in.
What plant hardiness zone is Denton in?
The USDA's 2023 map puts Denton in zone 4b in ZIP code 59424, the nearest ZIP area. By the same method at Denton's NOAA station, the coldest night of a typical year reaches −30°F (15 years, 1991-2020): zone 4a.
How late can frost come in Denton?
In half of years the last 32°F night comes after June 1; in one year in ten it comes after June 26. Waiting until June 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Montana climateThe statewide normals and every place in the state
- Stanford, MT17 miles from this station, 44.6°F a year
- Moccasin, MT18 miles from this station, 43.5°F a year
- Geraldine, MT25 miles from this station, 46.8°F a year
- Lewistown, MT29 miles from this station, 43.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made