Eureka, Nevada climate: Normal weather by month, frost dates and records
Eureka's normal year runs from 12°F December nights to 90°F July afternoons, with 9.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.9°C, December lows of −11°C, July highs of 32°C, 231 mm of precipitation a year.
- NOAA stationEureka Airport
- Station IDUSW00003170
- Location39.60°N 116.01°W
- Elevation5,936 ft (1,809 m)
- Population (census place)364
On October 23, the normal high in Eureka is 62°F and the normal low 27°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 Eureka.
- Jan 39° 13°
- Feb 43° 16°
- Mar 52° 24°
- Apr 59° 28°
- May 69° 35°
- Jun 81° 42°
- Jul 90° 50°
- Aug 88° 48°
- Sep 78° 40°
- Oct 65° 29°
- Nov 50° 20°
- Dec 39° 12°
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 Eureka each month?
July is the warmest month, with normal highs of 90°F; December the coldest, with normal lows of 12°F. The most precipitation falls in May (1.16 in), the least in August (0.54 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 39°F | 13°F | 25.9°F | 0.80 | 8 | <1 | 30 | 9 h 40 min |
| February | 43°F | 16°F | 29.5°F | 0.78 | 8 | <1 | 27 | 10 h 40 min |
| March | 52°F | 24°F | 38.0°F | 0.97 | 7 | <1 | 28 | 11 h 50 min |
| April | 59°F | 28°F | 43.5°F | 1.08 | 10 | <1 | 22 | 13 h 10 min |
| May | 69°F | 35°F | 52.0°F | 1.16 | 8 | <1 | 11 | 14 h 20 min |
| June | 81°F | 42°F | 61.7°F | 0.63 | 4 | 7 | 2 | 15 h |
| July | 90°F | 50°F | 70.0°F | 0.58 | 5 | 21 | <1 | 14 h 40 min |
| August | 88°F | 48°F | 68.2°F | 0.54 | 4 | 16 | <1 | 13 h 50 min |
| September | 78°F | 40°F | 59.1°F | 0.57 | 4 | 2 | 5 | 12 h 30 min |
| October | 65°F | 29°F | 46.8°F | 0.61 | 4 | <1 | 21 | 11 h 10 min |
| November | 50°F | 20°F | 35.1°F | 0.64 | 6 | <1 | 28 | 10 h |
| December | 39°F | 12°F | 25.5°F | 0.74 | 8 | <1 | 31 | 9 h 20 min |
| Year (annual) | 63°F | 30°F | 46.3°F | 9.10 | 76 | 46 | 207 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −11°C | −3.4°C | 20 mm |
| February | 6°C | −9°C | −1.4°C | 20 mm |
| March | 11°C | −5°C | 3.3°C | 25 mm |
| April | 15°C | −2°C | 6.4°C | 27 mm |
| May | 20°C | 2°C | 11.1°C | 29 mm |
| June | 27°C | 6°C | 16.5°C | 16 mm |
| July | 32°C | 10°C | 21.1°C | 15 mm |
| August | 31°C | 9°C | 20.1°C | 14 mm |
| September | 26°C | 4°C | 15.1°C | 14 mm |
| October | 18°C | −2°C | 8.2°C | 15 mm |
| November | 10°C | −7°C | 1.7°C | 16 mm |
| December | 4°C | −11°C | −3.6°C | 19 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Eureka's own co-op station Eureka station does: 47 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003170; 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 Eureka?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, June has the fewest days with rain (4).
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 USW00003170.
When is the last frost in Eureka?
In Eureka, the last spring frost (32°F) comes after June 7 in half of years and after June 23 in one year in ten; the first autumn frost comes before September 17 in half of years and before September 2 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 71 year in 10 after June 23; 9 in 10 after May 22
- First autumn frost, half of years before
- September 171 year in 10 before September 2; 9 in 10 before October 1
NOAA puts the median frost-free season at 100 days, and the season without a hard freeze (28°F) at 125 days.
A hard freeze (28°F) comes after May 24 in half of springs and before September 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Eureka in zone 5b in ZIP code 89316, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Eureka's NOAA station is in zone 5b: the coldest night of a typical year reaches −14°F (23 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 USW00003170; 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 Eureka?
In a normal year in Eureka, 46 days a year reach 90°F (2 of them 100°F or more), 207 nights fall to 32°F or colder and 76 days bring measurable precipitation.
- Days at 90°F or more
- 46a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 207a normal year
- Days that stay below freezing
- 23high of 32°F or less
- Days with 0.01 inch of precipitation
- 76a normal year
The highest temperature in Eureka's official record (kept by the National Weather Service since 1963) is 105°F, on July 5, 1985; the lowest is −37°F, on February 6, 1982.
The wettest calendar year on that record is 1995, with 15.27 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00003170; records: ACIS (NOAA Regional Climate Centers), NWS threaded record P68thr. Records use complete months only; a month missing more than three days is left out.
How sunny is Eureka?
Over a year 82% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Eureka, 5.0 kWh per square metre a day. September is the sunniest month (89%) and December the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 2.4 |
| February | 74% | 3.4 |
| March | 77% | 4.7 |
| April | 77% | 5.9 |
| May | 80% | 6.9 |
| June | 88% | 8.0 |
| July | 86% | 7.4 |
| August | 88% | 6.8 |
| September | 89% | 5.8 |
| October | 86% | 4.2 |
| November | 79% | 2.8 |
| December | 69% | 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 Eureka need?
A normal year in Eureka brings 7,156 heating degree days, 33% more than the median U.S. place (5,373), and 356 cooling degree days, 61% 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 2,063 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,212 | 0 |
| February | 994 | 0 |
| March | 839 | 0 |
| April | 646 | 0 |
| May | 407 | 4 |
| June | 141 | 44 |
| July | 11 | 166 |
| August | 24 | 123 |
| September | 195 | 19 |
| October | 564 | 0 |
| November | 899 | 0 |
| December | 1,224 | 0 |
| Year (annual) | 7,156 | 356 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003170. 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 Eureka been warmer than normal lately?
2025 averaged 48.9°F, 2.6°F above the 1991-2020 normal of 46.3°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.8°F | +1.5°F | 10.12 |
| 2022 | 46.5°F | +0.3°F | 10.27 |
| 2023 | 45.0°F | −1.3°F | 9.94 |
| 2024 | 48.4°F | +2.1°F | 7.70 |
| 2025 | 48.9°F | +2.6°F | 6.13 |
Source: observed years: ACIS, station USW00003170. A year counts only with all twelve months complete.
How does Eureka's climate compare?
Eureka is warmer than 8 of the other 54 places with their own NOAA record in Nevada, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 46.3°F is warmer than 25%.
In the Köppen classification computed from these normals, Eureka 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.
What do Eureka's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Eureka. This page uses Eureka Airport; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Eureka station USC00262708 | 6 mi S | 6,430 ft | 46.2°F | 18°F | 86°F | 10.9 | 47 | June 2 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Eureka's climate
What is the coldest month in Eureka?
December, with a normal high of 39°F and a normal low of 12°F. The warmest is July (90°F by day, 50°F at night).
Does it snow in Eureka?
Yes. NOAA publishes no 1991-2020 snowfall normal for Eureka's NOAA station; Eureka's own co-op station Eureka station records 47 inches of snow in a normal year.
What is the rainiest month in Eureka?
May, with 1.16 in of precipitation in a normal year; the driest is August with 0.54 in.
What plant hardiness zone is Eureka in?
The USDA's 2023 map puts Eureka in zone 5b in ZIP code 89316, the nearest ZIP area. By the same method at Eureka's NOAA station, the coldest night of a typical year reaches −14°F (23 years, 1991-2020): zone 5b.
How late can frost come in Eureka?
In half of years the last 32°F night comes after June 7; in one year in ten it comes after June 23. Waiting until June 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Nevada climateThe statewide normals and every place in the state
- Diamond Valley - Eureka (14 mi NNW), NV7 miles from this station, 45.6°F a year
- Beowawe 49 mi S - University of Nevada Ranch, NV37 miles from this station, 47.9°F a year
- Moorman Ranch - Ruth (16 mi WNW), NV40 miles from this station, 43.5°F a year
- Snowball Ranch, NV40 miles from this station, 45.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made