Theodore Roosevelt Airport, North Dakota climate: Climate normals at a NOAA weather station
Theodore Roosevelt Airport's normal year runs from 6°F January nights to 84°F July afternoons, with 15.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.0°C, January lows of −14°C, July highs of 29°C, 397 mm of precipitation a year.
- NOAA stationTheodore Roosevelt Airport
- Station IDUSW00024012
- Location46.80°N 102.80°W
- Elevation2,580 ft (786 m)
On October 23, the normal high in Theodore Roosevelt Airport is 52°F and the normal low 28°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Theodore Roosevelt Airport.
- Jan 27° 6°
- Feb 30° 9°
- Mar 42° 19°
- Apr 55° 28°
- May 66° 40°
- Jun 76° 49°
- Jul 84° 55°
- Aug 84° 53°
- Sep 73° 44°
- Oct 56° 31°
- Nov 41° 19°
- Dec 30° 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 Theodore Roosevelt Airport each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 6°F. The most precipitation falls in June (3.05 in), the least in December (0.19 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 27°F | 6°F | 16.4°F | 0.25 | 5 | <1 | 31 | 9 h |
| February | 30°F | 9°F | 19.6°F | 0.32 | 4 | <1 | 27 | 10 h 20 min |
| March | 42°F | 19°F | 30.3°F | 0.56 | 6 | <1 | 28 | 11 h 50 min |
| April | 55°F | 28°F | 41.6°F | 1.37 | 8 | <1 | 20 | 13 h 30 min |
| May | 66°F | 40°F | 52.9°F | 2.55 | 11 | <1 | 6 | 15 h |
| June | 76°F | 49°F | 62.5°F | 3.05 | 13 | 2 | <1 | 15 h 50 min |
| July | 84°F | 55°F | 69.4°F | 2.55 | 10 | 8 | <1 | 15 h 30 min |
| August | 84°F | 53°F | 68.5°F | 1.53 | 7 | 8 | <1 | 14 h 20 min |
| September | 73°F | 44°F | 58.5°F | 1.62 | 7 | 2 | 2 | 12 h 40 min |
| October | 56°F | 31°F | 43.8°F | 1.17 | 6 | <1 | 17 | 11 h |
| November | 41°F | 19°F | 30.3°F | 0.47 | 5 | <1 | 28 | 9 h 30 min |
| December | 30°F | 10°F | 19.9°F | 0.19 | 4 | <1 | 31 | 8 h 30 min |
| Year (annual) | 55°F | 30°F | 42.8°F | 15.63 | 85 | 20 | 189 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −3°C | −14°C | −8.7°C | 6 mm |
| February | −1°C | −13°C | −6.9°C | 8 mm |
| March | 6°C | −7°C | −0.9°C | 14 mm |
| April | 13°C | −2°C | 5.3°C | 35 mm |
| May | 19°C | 4°C | 11.6°C | 65 mm |
| June | 24°C | 10°C | 16.9°C | 77 mm |
| July | 29°C | 13°C | 20.8°C | 65 mm |
| August | 29°C | 12°C | 20.3°C | 39 mm |
| September | 23°C | 7°C | 14.7°C | 41 mm |
| October | 14°C | 0°C | 6.6°C | 30 mm |
| November | 5°C | −7°C | −0.9°C | 12 mm |
| December | −1°C | −12°C | −6.7°C | 5 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, New England (18 miles away), gets 44 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024012; 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 Theodore Roosevelt Airport?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (7).
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 USW00024012.
When is the last frost at Theodore Roosevelt Airport?
In Theodore Roosevelt Airport, the last spring frost (32°F) comes after May 18 in half of years and after May 31 in one year in ten; the first autumn frost comes before September 25 in half of years and before September 12 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 181 year in 10 after May 31; 9 in 10 after May 6
- First autumn frost, half of years before
- September 251 year in 10 before September 12; 9 in 10 before October 7
NOAA puts the median frost-free season at 129 days, and the season without a hard freeze (28°F) at 147 days.
A hard freeze (28°F) comes after May 8 in half of springs and before October 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Theodore Roosevelt Airport in zone 4b in ZIP code 58601, 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).
Frost dates for every NOAA station in North Dakota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00024012; 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 Theodore Roosevelt Airport?
In a normal year in Theodore Roosevelt Airport, 20 days a year reach 90°F (2 of them 100°F or more), 189 nights fall to 32°F or colder and 85 days bring measurable precipitation.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 189a normal year
- Days that stay below freezing
- 71high of 32°F or less
- Days with 0.01 inch of precipitation
- 85a normal year
The highest temperature in this station's record (since 1948) is 109°F, on July 7, 1981; the lowest is −36°F, on February 18, 2025.
The wettest calendar year on that record is 1982, with 25.54 in; the snowiest season is 1981–82, with 66.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00024012; records: ACIS (NOAA Regional Climate Centers), station USW00024012. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Theodore Roosevelt Airport?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Theodore Roosevelt Airport, 4.1 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 1.8 |
| February | 78% | 2.8 |
| March | 73% | 3.8 |
| April | 72% | 4.9 |
| May | 73% | 5.9 |
| June | 79% | 6.7 |
| July | 87% | 7.0 |
| August | 84% | 5.8 |
| September | 80% | 4.4 |
| October | 73% | 2.8 |
| November | 73% | 1.8 |
| 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 Theodore Roosevelt Airport record?
A normal year at Theodore Roosevelt Airport brings 8,471 heating degree days, 58% more than the median U.S. place (5,373), and 419 cooling degree days, 54% 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 2,094 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,507 | 0 |
| February | 1,271 | 0 |
| March | 1,074 | 0 |
| April | 704 | 0 |
| May | 384 | 9 |
| June | 124 | 49 |
| July | 30 | 167 |
| August | 47 | 154 |
| September | 234 | 39 |
| October | 659 | 2 |
| November | 1,041 | 0 |
| December | 1,398 | 0 |
| Year (annual) | 8,471 | 419 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024012. 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 Theodore Roosevelt Airport been warmer than normal?
2025 averaged 42.9°F, 0.1°F above the 1991-2020 normal of 42.8°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 45.6°F | +2.8°F | – |
| 2022 | 41.6°F | −1.2°F | – |
| 2023 | 43.6°F | +0.8°F | – |
| 2024 | 44.9°F | +2.1°F | – |
| 2025 | 42.9°F | +0.1°F | – |
Over 71 complete years from 1950 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 USW00024012; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Theodore Roosevelt Airport's climate compare?
Theodore Roosevelt Airport is warmer than 76 of the 92 places with their own NOAA record in North Dakota, and wetter than 4. 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, Theodore Roosevelt Airport 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 Theodore Roosevelt Airport's climate
What is the coldest month at Theodore Roosevelt Airport?
January, with a normal high of 27°F and a normal low of 6°F. The warmest is July (84°F by day, 55°F at night).
Does it snow at Theodore Roosevelt Airport?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, New England (18 miles away), records 44 inches of snow in a normal year.
What is the rainiest month at Theodore Roosevelt Airport?
June, with 3.05 in of precipitation in a normal year; the driest is December with 0.19 in.
What plant hardiness zone is Theodore Roosevelt Airport in?
The USDA's 2023 map puts Theodore Roosevelt Airport in zone 4b in ZIP code 58601, 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 Theodore Roosevelt Airport?
In half of years the last 32°F night comes after May 18; in one year in ten it comes after May 31. Waiting until May 31 leaves about a one-in-ten chance of a later frost.
Nearby and next
- North Dakota climateThe statewide normals and every place in the state
- Dickinson, ND6 miles from this station, 42.0°F a year
- New England, ND18 miles from this station, 43.3°F a year
- Taylor, ND21 miles from this station, 42.5°F a year
- Richardton, ND24 miles from this station, 43.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made