Arthur, Nebraska climate: Normal weather by month, frost dates and records
Arthur's normal year runs from 14°F January nights to 88°F July afternoons, with 20.6 inches of precipitation and 33 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.3°C, January lows of −10°C, July highs of 31°C, 523 mm of precipitation a year.
- NOAA stationArthur
- Station IDUSC00250365
- Location41.57°N 101.69°W
- Elevation3,660 ft (1,116 m)
- Population126
On October 23, the normal high in Arthur is 60°F and the normal low 31°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 Arthur.
- Jan 38° 14°
- Feb 41° 16°
- Mar 52° 25°
- Apr 60° 33°
- May 70° 44°
- Jun 82° 54°
- Jul 88° 60°
- Aug 86° 58°
- Sep 78° 48°
- Oct 63° 34°
- Nov 50° 23°
- Dec 39° 15°
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 Arthur each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 14°F. The most precipitation falls in July (3.49 in), the least in December (0.33 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 38°F | 14°F | 25.8°F | 0.36 | 4.5 | 2 | <1 | 30 | 9 h 30 min |
| February | 41°F | 16°F | 28.6°F | 0.47 | 6.0 | 3 | <1 | 27 | 10 h 40 min |
| March | 52°F | 25°F | 38.1°F | 1.13 | 5.3 | 4 | <1 | 25 | 11 h 50 min |
| April | 60°F | 33°F | 46.7°F | 2.20 | 5.8 | 7 | <1 | 14 | 13 h 20 min |
| May | 70°F | 44°F | 57.3°F | 3.37 | 0.5 | 10 | 1 | 3 | 14 h 30 min |
| June | 82°F | 54°F | 68.1°F | 3.21 | 0.0 | 10 | 6 | <1 | 15 h 10 min |
| July | 88°F | 60°F | 74.1°F | 3.49 | 0.0 | 9 | 15 | <1 | 15 h |
| August | 86°F | 58°F | 72.1°F | 2.30 | 0.0 | 7 | 11 | <1 | 13 h 50 min |
| September | 78°F | 48°F | 63.0°F | 1.89 | 0.2 | 6 | 5 | 1 | 12 h 30 min |
| October | 63°F | 34°F | 48.7°F | 1.38 | 2.2 | 6 | <1 | 12 | 11 h 10 min |
| November | 50°F | 23°F | 36.5°F | 0.47 | 3.4 | 3 | <1 | 26 | 9 h 50 min |
| December | 39°F | 15°F | 26.9°F | 0.33 | 5.0 | 2 | <1 | 31 | 9 h 10 min |
| Year (annual) | 62°F | 35°F | 48.8°F | 20.60 | 32.9 | 68 | 38 | 169 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −10°C | −3.4°C | 9 mm | 11 cm |
| February | 5°C | −9°C | −1.9°C | 12 mm | 15 cm |
| March | 11°C | −4°C | 3.4°C | 29 mm | 13 cm |
| April | 16°C | 1°C | 8.2°C | 56 mm | 15 cm |
| May | 21°C | 7°C | 14.1°C | 86 mm | 1 cm |
| June | 28°C | 12°C | 20.1°C | 82 mm | 0 cm |
| July | 31°C | 16°C | 23.4°C | 89 mm | 0 cm |
| August | 30°C | 14°C | 22.3°C | 58 mm | 0 cm |
| September | 25°C | 9°C | 17.2°C | 48 mm | 1 cm |
| October | 17°C | 1°C | 9.3°C | 35 mm | 6 cm |
| November | 10°C | −5°C | 2.5°C | 12 mm | 9 cm |
| December | 4°C | −9°C | −2.8°C | 8 mm | 13 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00250365; 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 Arthur?
Normal highs sit between 65°F and 85°F in May, June 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 USC00250365.
When is the last frost in Arthur?
In Arthur, the last spring frost (32°F) comes after May 9 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 3 in half of years and before September 20 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 91 year in 10 after May 22; 9 in 10 after April 29
- First autumn frost, half of years before
- October 31 year in 10 before September 20; 9 in 10 before October 16
NOAA puts the median frost-free season at 144 days, and the season without a hard freeze (28°F) at 165 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Arthur in zone 5b in ZIP code 69121, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Arthur's NOAA station is in zone 5b: the coldest night of a typical year reaches −15°F (28 complete years).
Frost dates for every NOAA station in Nebraska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00250365; 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 Arthur?
In a normal year in Arthur, 38 days a year reach 90°F (2 of them 100°F or more), 169 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
- 2a normal year
- Nights at 32°F or colder
- 169a normal year
- Days that stay below freezing
- 37high of 32°F or less
- Days with 0.01 inch of precipitation
- 68a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1929) is 113°F, on July 25, 1936; the lowest is −33°F, on December 22, 1989.
The wettest calendar year on that record is 2009, with 28.56 in; the snowiest season is 1979–80, with 66.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00250365; records: ACIS (NOAA Regional Climate Centers), station USC00250365. Records use complete months only; a month missing more than three days is left out.
How sunny is Arthur?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Arthur, 4.6 kWh per square metre a day. July is the sunniest month (87%) and April the cloudiest (75%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.3 |
| February | 75% | 3.1 |
| March | 76% | 4.4 |
| April | 75% | 5.4 |
| May | 76% | 6.3 |
| June | 84% | 7.2 |
| July | 87% | 7.1 |
| August | 86% | 6.1 |
| September | 85% | 5.0 |
| October | 79% | 3.5 |
| November | 79% | 2.5 |
| December | 76% | 2.0 |
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 Arthur need?
A normal year in Arthur brings 6,645 heating degree days, 24% more than the median U.S. place (5,373), and 780 cooling degree days, 14% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,858 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,215 | 0 |
| February | 1,021 | 0 |
| March | 833 | 0 |
| April | 552 | 2 |
| May | 270 | 30 |
| June | 53 | 144 |
| July | 7 | 288 |
| August | 16 | 234 |
| September | 140 | 80 |
| October | 508 | 3 |
| November | 854 | 0 |
| December | 1,179 | 0 |
| Year (annual) | 6,645 | 780 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00250365. 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.
Has Arthur been warmer than normal lately?
2025 averaged 50.8°F, 2.0°F above the 1991-2020 normal of 48.8°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 50.7°F | +1.9°F | 19.97 | 42.7 |
| 2022 | 49.5°F | +0.7°F | 14.73 | 28.4 |
| 2023 | 49.4°F | +0.6°F | 27.28 | – |
| 2024 | 51.5°F | +2.7°F | 17.06 | – |
| 2025 | 50.8°F | +2.0°F | 17.76 | – |
Over 63 complete years from 1930 to 2025, the station's annual mean temperature rose at a fitted 3.9°F per century (+0.22°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00250365; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Arthur's climate compare?
Arthur is warmer than 42 of the other 136 places with their own NOAA record in Nebraska, and wetter than 25. Across the 7,247 U.S. stations with normals, its annual mean of 48.8°F is warmer than 35%.
In the Köppen classification computed from these normals, Arthur is Dwa: continental, dry-winter, hot 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 Arthur's climate
What is the coldest month in Arthur?
January, with a normal high of 38°F and a normal low of 14°F. The warmest is July (88°F by day, 60°F at night).
Does it snow in Arthur?
Yes: 33 inches in a normal year, falling on 16 days with 0.1 inch or more, the most in February (6.0 inches).
What is the rainiest month in Arthur?
July, with 3.49 in of precipitation in a normal year; the driest is December with 0.33 in.
What plant hardiness zone is Arthur in?
The USDA's 2023 map puts Arthur in zone 5b in ZIP code 69121, the nearest ZIP area. By the same method at Arthur's NOAA station, the coldest night of a typical year reaches −15°F (28 years, 1991-2020): zone 5b.
How late can frost come in Arthur?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Nebraska climateThe statewide normals and every place in the state
- Kingsley Dam, NE25 miles from this station, 50.0°F a year
- Ogallala, NE30 miles from this station, 50.6°F a year
- Oshkosh, NE36 miles from this station, 49.0°F a year
- Whitman (5 mi ENE), NE37 miles from this station, 48.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made