Overton, Nevada climate: Climate normals at a NOAA weather station
Overton's normal year runs from 32°F December nights to 109°F July afternoons, with 5.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.4°C, December lows of 0°C, July highs of 43°C, 142 mm of precipitation a year.
- NOAA stationOverton
- Station IDUSC00265846
- Location36.55°N 114.46°W
- Elevation1,250 ft (381 m)
On October 23, the normal high in Overton is 83°F and the normal low 49°F, and the chance of measurable rain or snow is 6%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Overton.
- Jan 62° 33°
- Feb 67° 38°
- Mar 75° 44°
- Apr 83° 50°
- May 93° 59°
- Jun 104° 68°
- Jul 109° 75°
- Aug 107° 73°
- Sep 100° 65°
- Oct 86° 52°
- Nov 71° 40°
- Dec 61° 32°
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 Overton each month?
July is the warmest month, with normal highs of 109°F; December the coldest, with normal lows of 32°F. The most precipitation falls in February (0.91 in), the least in June (0.05 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 62°F | 33°F | 47.7°F | 0.69 | 4 | <1 | 14 | 10 h |
| February | 67°F | 38°F | 52.2°F | 0.91 | 4 | <1 | 6 | 10 h 50 min |
| March | 75°F | 44°F | 59.7°F | 0.81 | 3 | 1 | 1 | 11 h 50 min |
| April | 83°F | 50°F | 66.7°F | 0.31 | 2 | 8 | <1 | 13 h 10 min |
| May | 93°F | 59°F | 76.2°F | 0.14 | 1 | 21 | <1 | 14 h 10 min |
| June | 104°F | 68°F | 85.8°F | 0.05 | 1 | 29 | <1 | 14 h 40 min |
| July | 109°F | 75°F | 92.0°F | 0.38 | 2 | 31 | <1 | 14 h 30 min |
| August | 107°F | 73°F | 90.4°F | 0.44 | 2 | 31 | <1 | 13 h 40 min |
| September | 100°F | 65°F | 82.6°F | 0.26 | 1 | 28 | <1 | 12 h 30 min |
| October | 86°F | 52°F | 69.1°F | 0.48 | 2 | 11 | <1 | 11 h 20 min |
| November | 71°F | 40°F | 55.4°F | 0.47 | 2 | <1 | 4 | 10 h 20 min |
| December | 61°F | 32°F | 46.4°F | 0.64 | 3 | <1 | 17 | 9 h 40 min |
| Year (annual) | 85°F | 53°F | 68.7°F | 5.58 | 27 | 160 | 42 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 1°C | 8.7°C | 18 mm |
| February | 19°C | 3°C | 11.2°C | 23 mm |
| March | 24°C | 7°C | 15.4°C | 21 mm |
| April | 28°C | 10°C | 19.3°C | 8 mm |
| May | 34°C | 15°C | 24.6°C | 4 mm |
| June | 40°C | 20°C | 29.9°C | 1 mm |
| July | 43°C | 24°C | 33.3°C | 10 mm |
| August | 42°C | 23°C | 32.4°C | 11 mm |
| September | 38°C | 18°C | 28.1°C | 7 mm |
| October | 30°C | 11°C | 20.6°C | 12 mm |
| November | 22°C | 4°C | 13.0°C | 12 mm |
| December | 16°C | 0°C | 8.0°C | 16 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00265846; 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 Overton?
Normal highs sit between 65°F and 85°F in February, March, April and November. Of those, November has the fewest days with rain (2).
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 USC00265846.
When is the last frost at Overton?
In Overton, the last spring frost (32°F) comes after February 26 in half of years and after March 16 in one year in ten; the first autumn frost comes before November 22 in half of years and before November 9 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
- February 261 year in 10 after March 16; 9 in 10 after February 4
- First autumn frost, half of years before
- November 221 year in 10 before November 9; 9 in 10 before December 6
NOAA puts the median frost-free season at 268 days, and the season without a hard freeze (28°F) at 299 days.
A hard freeze (28°F) comes after February 5 in half of springs and before December 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Overton in zone 9a in ZIP code 89021, 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 9a: the coldest night of a typical year reaches 21°F (27 complete years).
Frost dates for every NOAA station in Nevada · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00265846; 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 Overton?
In a normal year in Overton, 160 days a year reach 90°F (109 of them 100°F or more), 42 nights fall to 32°F or colder and 27 days bring measurable precipitation.
- Days at 90°F or more
- 160a normal year
- Days at 100°F or more
- 109a normal year
- Nights at 32°F or colder
- 42a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 27a normal year
The highest temperature in this station's record (since 1939) is 122°F, on June 23, 1954; the lowest is 8°F, on January 3, 1954.
The wettest calendar year on that record is 2019, with 10.51 in; the snowiest season is 1948–49, with 8.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00265846; records: ACIS (NOAA Regional Climate Centers), station USC00265846. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Overton?
Over a year 91% of the sunlight that would reach the ground under clear skies gets through the clouds at Overton, 5.6 kWh per square metre a day. June is the sunniest month (96%) and December the cloudiest (82%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 85% | 3.0 |
| February | 84% | 4.0 |
| March | 88% | 5.5 |
| April | 90% | 6.9 |
| May | 93% | 7.9 |
| June | 96% | 8.6 |
| July | 92% | 7.7 |
| August | 94% | 7.1 |
| September | 95% | 6.2 |
| October | 91% | 4.7 |
| November | 89% | 3.4 |
| December | 82% | 2.6 |
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 Overton record?
A normal year at Overton brings 2,067 heating degree days, 62% fewer than the median U.S. place (5,373), and 3,443 cooling degree days, 3.8 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,159 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 536 | 0 |
| February | 359 | 0 |
| March | 188 | 22 |
| April | 63 | 113 |
| May | 8 | 356 |
| June | 1 | 626 |
| July | 0 | 838 |
| August | 0 | 786 |
| September | 1 | 527 |
| October | 42 | 167 |
| November | 295 | 9 |
| December | 575 | 0 |
| Year (annual) | 2,067 | 3,443 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00265846. 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 Overton been warmer than normal?
2025 averaged 70.0°F, 1.3°F above the 1991-2020 normal of 68.7°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.4°F | +0.7°F | 4.53 |
| 2022 | 68.8°F | +0.1°F | 4.50 |
| 2023 | 67.8°F | −1.0°F | 6.99 |
| 2024 | 70.4°F | +1.7°F | 3.92 |
| 2025 | 70.0°F | +1.3°F | 4.06 |
Source: observed years: ACIS, station USC00265846. A year counts only with all twelve months complete.
How does Overton's climate compare?
Overton is warmer than 51 of the 55 places with their own NOAA record in Nevada, and wetter than 12. Across the 7,247 U.S. stations with normals, its annual mean of 68.7°F is warmer than 94%.
In the Köppen classification computed from these normals, Overton is BWh: hot desert. 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 Overton share this climate record?
2 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.
- Moapa Valley, NV6,699 people · 4 mi N
- Moapa Town, NV967 people · 14 mi NW
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 Overton's climate
What is the coldest month at Overton?
December, with a normal high of 61°F and a normal low of 32°F. The warmest is July (109°F by day, 75°F at night).
Does it snow at Overton?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Overton?
February, with 0.91 in of precipitation in a normal year; the driest is June with 0.05 in.
What plant hardiness zone is Overton in?
The USDA's 2023 map puts Overton in zone 9a in ZIP code 89021, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 21°F (27 years, 1991-2020): zone 9a.
How late can frost come at Overton?
In half of years the last 32°F night comes after February 26; in one year in ten it comes after March 16. Waiting until March 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Nevada climateThe statewide normals and every place in the state
- Valley Of Fire State Park, NV9 miles from this station, 70.2°F a year
- Echo Bay, NV17 miles from this station, 70.3°F a year
- Bunkerville, NV25 miles from this station, 65.5°F a year
- Callville Bay, NV32 miles from this station, 71.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made