Mullen, Nebraska climate: Normal weather by month, frost dates and records
Mullen's normal year runs from 15°F January nights to 86°F July afternoons, with 24.3 inches of precipitation and 42 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.2°C, January lows of −10°C, July highs of 30°C, 616 mm of precipitation a year.
- NOAA stationMullen
- Station IDUSC00255700
- Location42.04°N 101.05°W
- Elevation3,215 ft (980 m)
- Population465
On October 24, the normal high in Mullen is 58°F and the normal low 33°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Mullen.
- Jan 37° 15°
- Feb 39° 17°
- Mar 50° 25°
- Apr 59° 34°
- May 69° 45°
- Jun 80° 55°
- Jul 86° 61°
- Aug 84° 58°
- Sep 76° 49°
- Oct 62° 36°
- Nov 49° 25°
- Dec 38° 16°
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 Mullen each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 15°F. The most precipitation falls in June (3.95 in), the least in January (0.36 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 37°F | 15°F | 25.8°F | 0.36 | 4.6 | 4 | <1 | 30 | 9 h 30 min |
| February | 39°F | 17°F | 28.1°F | 0.52 | 8.2 | 5 | <1 | 27 | 10 h 30 min |
| March | 50°F | 25°F | 37.5°F | 1.33 | 5.8 | 6 | <1 | 24 | 11 h 50 min |
| April | 59°F | 34°F | 46.3°F | 2.57 | 7.7 | 9 | <1 | 13 | 13 h 20 min |
| May | 69°F | 45°F | 56.7°F | 3.81 | 0.8 | 12 | 1 | 4 | 14 h 30 min |
| June | 80°F | 55°F | 67.4°F | 3.95 | 0.0 | 10 | 5 | <1 | 15 h 10 min |
| July | 86°F | 61°F | 73.3°F | 3.95 | 0.0 | 10 | 11 | <1 | 15 h |
| August | 84°F | 58°F | 71.3°F | 2.27 | 0.0 | 7 | 8 | <1 | 14 h |
| September | 76°F | 49°F | 62.7°F | 2.56 | 0.0 | 7 | 3 | 1 | 12 h 30 min |
| October | 62°F | 36°F | 48.9°F | 1.85 | 1.8 | 6 | <1 | 11 | 11 h 10 min |
| November | 49°F | 25°F | 36.8°F | 0.65 | 5.2 | 4 | <1 | 25 | 9 h 50 min |
| December | 38°F | 16°F | 27.0°F | 0.43 | 7.7 | 4 | <1 | 30 | 9 h 10 min |
| Year (annual) | 61°F | 36°F | 48.5°F | 24.25 | 41.8 | 82 | 28 | 164 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −10°C | −3.4°C | 9 mm | 12 cm |
| February | 4°C | −8°C | −2.2°C | 13 mm | 21 cm |
| March | 10°C | −4°C | 3.1°C | 34 mm | 15 cm |
| April | 15°C | 1°C | 7.9°C | 65 mm | 20 cm |
| May | 20°C | 7°C | 13.7°C | 97 mm | 2 cm |
| June | 27°C | 13°C | 19.7°C | 100 mm | 0 cm |
| July | 30°C | 16°C | 22.9°C | 100 mm | 0 cm |
| August | 29°C | 15°C | 21.8°C | 58 mm | 0 cm |
| September | 25°C | 9°C | 17.1°C | 65 mm | 0 cm |
| October | 16°C | 2°C | 9.4°C | 47 mm | 5 cm |
| November | 9°C | −4°C | 2.7°C | 17 mm | 13 cm |
| December | 3°C | −9°C | −2.8°C | 11 mm | 20 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00255700; 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 Mullen?
Normal highs sit between 65°F and 85°F in May, June, 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 USC00255700.
When is the last frost in Mullen?
In Mullen, the last spring frost (32°F) comes after May 7 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 5 in half of years and before September 22 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 71 year in 10 after May 22; 9 in 10 after April 24
- First autumn frost, half of years before
- October 51 year in 10 before September 22; 9 in 10 before October 17
NOAA puts the median frost-free season at 150 days, and the season without a hard freeze (28°F) at 169 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Mullen in zone 5b in ZIP code 69152, the nearest ZIP area.
Frost dates for every NOAA station in Nebraska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00255700; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Mullen?
In a normal year in Mullen, 28 days a year reach 90°F (2 of them 100°F or more), 164 nights fall to 32°F or colder and 82 days bring measurable precipitation.
- Days at 90°F or more
- 28a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 164a normal year
- Days that stay below freezing
- 40high of 32°F or less
- Days with 0.01 inch of precipitation
- 82a normal year
- Days with 1 inch of snow or more
- 14a normal year
The highest temperature in this station's record (since 1895) is 110°F, on July 25, 1936; the lowest is −38°F, on February 6, 1936.
The wettest calendar year on that record is 2018, with 33.94 in; the snowiest season is 1987–88, with 76.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00255700; records: ACIS (NOAA Regional Climate Centers), station USC00255700. Records use complete months only; a month missing more than three days is left out.
How sunny is Mullen?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Mullen, 4.5 kWh per square metre a day. July is the sunniest month (87%) and April the cloudiest (73%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 2.2 |
| February | 78% | 3.2 |
| March | 75% | 4.2 |
| April | 73% | 5.3 |
| May | 75% | 6.2 |
| June | 83% | 7.1 |
| July | 87% | 7.1 |
| August | 86% | 6.1 |
| September | 84% | 4.9 |
| October | 78% | 3.4 |
| November | 79% | 2.4 |
| December | 77% | 1.9 |
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 Mullen need?
A normal year in Mullen brings 6,695 heating degree days, 25% more than the median U.S. place (5,373), and 710 cooling degree days, 22% 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 2,783 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,214 | 0 |
| February | 1,033 | 0 |
| March | 851 | 0 |
| April | 563 | 2 |
| May | 288 | 29 |
| June | 52 | 124 |
| July | 7 | 264 |
| August | 21 | 214 |
| September | 142 | 73 |
| October | 503 | 4 |
| November | 846 | 0 |
| December | 1,176 | 0 |
| Year (annual) | 6,695 | 710 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00255700. 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 Mullen been warmer than normal lately?
2021 averaged 49.3°F, 0.8°F above the 1991-2020 normal of 48.5°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.3°F | +0.8°F | 21.61 | 31.9 |
Source: observed years: ACIS, station USC00255700. A year counts only with all twelve months complete.
How does Mullen's climate compare?
Mullen is warmer than 35 of the other 136 places with their own NOAA record in Nebraska, and wetter than 44. Across the 7,247 U.S. stations with normals, its annual mean of 48.5°F is warmer than 34%.
In the Köppen classification computed from these normals, Mullen 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.
Which places near Mullen share this climate record?
Seneca has no NOAA station with 1991-2020 normals of its 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.
- Seneca, NE28 people · 11 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Mullen's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Mullen. This page uses Mullen; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Mullen (21 mi NW) USC00255702 | 21 mi NW | 3,460 ft | 48.0°F | 13°F | 87°F | 23.7 | – | May 10 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Mullen's climate
What is the coldest month in Mullen?
January, with a normal high of 37°F and a normal low of 15°F. The warmest is July (86°F by day, 61°F at night).
Does it snow in Mullen?
Yes: 42 inches in a normal year, falling on 22 days with 0.1 inch or more, the most in February (8.2 inches).
What is the rainiest month in Mullen?
June, with 3.95 in of precipitation in a normal year; the driest is January with 0.36 in.
What plant hardiness zone is Mullen in?
The USDA's 2023 map puts Mullen in zone 5b in ZIP code 69152, the nearest ZIP area.
How late can frost come in Mullen?
In half of years the last 32°F night comes after May 7; 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
- Whitman (5 mi ENE), NE21 miles from this station, 48.0°F a year
- Purdum, NE41 miles from this station, 48.7°F a year
- Stapleton, NE47 miles from this station, 48.2°F a year
- Arthur, NE47 miles from this station, 48.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made