Omak, WA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Omak's primary NOAA station, OMAK AP.
The climate verdict for Omak
Dryness leads the climate profile for Omak, Washington, with 11.6 inches of precipitation a year. NOAA records an annual average of 50°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 50°F
- average temperature, NOAA 1991-2020 normal
- 52/100
- comfort score, above 24% of station-mapped location scores
- 11.6"
- yearly precipitation total
- 160 days
- frost-free days per growing season
Omak: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00094197 · Omak, WA 50°F mean · 11.6" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 50°F
- RANK-COOL #2,676
- PHOTO-FINISH ≈ Seibert
- PRCP-ARID 11.6"
- SWING-WIDE 46°F
- COMF-LOW 52/100
- LOAD-HEAT 6,177 HDD
- STN-1 USW00094197
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Seibert, CO (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every WA station list.
- Omak (this station) 50°F
- Cold Yoder, WY 50°F
- Hot Winnemucca, NV 50°F
- Near Seibert, CO 50°F
- Near Walden, NY 50°F
Climate Living Index · Omak
Omak: 32/100 · grade F
Omak publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Omak, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 49.9°F · 17.6° from 67.5°F | 40/100 · D |
| Normal heat + freeze calendar | 167 calendar days | 34/100 · F |
| Frost-free season | 160 days/year | 33/100 · F |
| Precipitation balance | 11.6 in · 23.4 from 35 in | 17/100 · F |
Omak · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Omak's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 73.7°F
- Coldest month
- 27.9°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Omak sits across the climate record
Three NOAA fields for Omak's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 39th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 91%
- Omak's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 63rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Omak compares across U.S. station-mapped locations
Omak's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 33°F (0°C) | 23°F (-5°C) | 28°F (-2°C) | 1.3" | 28.1 | 0.0 |
| February | 40°F (4°C) | 25°F (-4°C) | 33°F (0°C) | 0.9" | 24.2 | 0.0 |
| March | 53°F (11°C) | 31°F (0°C) | 42°F (5°C) | 1.1" | 19.9 | 0.0 |
| April | 63°F (17°C) | 37°F (3°C) | 50°F (10°C) | 0.8" | 10.8 | 0.0 |
| May | 72°F (22°C) | 45°F (7°C) | 59°F (15°C) | 1.2" | 2.4 | 0.8 |
| June | 79°F (26°C) | 51°F (11°C) | 65°F (18°C) | 1.0" | 0.0 | 4.2 |
| July | 89°F (32°C) | 58°F (15°C) | 74°F (23°C) | 0.5" | 0.0 | 17.2 |
| August | 89°F (32°C) | 57°F (14°C) | 73°F (23°C) | 0.3" | 0.0 | 16.2 |
| September | 78°F (26°C) | 48°F (9°C) | 63°F (17°C) | 0.4" | 0.7 | 3.3 |
| October | 61°F (16°C) | 38°F (3°C) | 49°F (10°C) | 0.9" | 10.1 | 0.0 |
| November | 43°F (6°C) | 29°F (-2°C) | 36°F (2°C) | 1.2" | 20.4 | 0.0 |
| December | 33°F (0°C) | 23°F (-5°C) | 28°F (-2°C) | 1.9" | 28.4 | 0.0 |
The year, day by day
Omak works both ends of the calendar. Normal highs climb to 92°F by July 27 and hold at or above 90°F on 28 dates, then normal lows drop to freezing or below on 139 dates, bottoming at 22°F around December 24.
When the heat sits
Normal highs reach 90°F from July 16 through August 12, covering 28 dates. The broader mild season, normal highs of 70°F or more, runs May 7 to October 1.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into March 19, then returns to freezing around November 2, covering 139 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is December 21, when 38% of years recorded at least a hundredth of an inch. The driest is August 6 at 8%. Summed across the calendar, that is about 82 wet dates a year.
The widest day
August 13 carries the biggest normal gap between afternoon and dawn, 32°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Omak.
Where Omak Stands Nationally
Aridity defines the water calendar: about 12 inches in a normal year lands this among the driest tenth of ranked stations.
Omak earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
10.0 days with precipitation
8.0 days with precipitation
7.6 days with precipitation
5.8 days with precipitation
7.6 days with precipitation
6.7 days with precipitation
3.1 days with precipitation
2.3 days with precipitation
3.8 days with precipitation
6.0 days with precipitation
9.1 days with precipitation
11.5 days with precipitation
Omak's wet season runs through the cold months
December, January and February carry 36% of the year's precipitation here, while June through August contribute 15%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows a wide 45.8°F gap between its warmest and coldest month.
- Wettest month
- December, 1.9"
- Driest month
- August, 0.3"
- Wettest three months
- December, January, November (39% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
Omak is dry, and what does fall arrives gently
Only about 82 days a year record measurable precipitation here, 22% of the calendar, and they carry 11.6" between them. At roughly 0.14 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is December at about 12 wet days; the driest is August at about 2.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Frost Dates & Growing Season
First Fall Freeze
October 7
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
160 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,177
Higher = more heating needed
Cooling Degree Days
703
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside WA closest to Omak on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (50°F here).
- Cedar Rapids, IA 50°F · 0.0°F off
- Centerville, IA 50°F · 0.0°F off
- Chalmers, IN 50°F · 0.0°F off
- Davenport, IA 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (11.6" here), excluding temperature-peer places.
- El Cajon, CA 11.6" · 0.0" off
- La Verkin, UT 11.6" · 0.0" off
- Ontario, CA 11.6" · 0.0" off
- Grantsville, UT 11.6" · 0.0" off
Scarce-water calendar
Where Omak's limited precipitation lands
heating led · dry · mid swing
Omak's energy balance leans toward cold weather: 6,177 annual heating degree days against 703 for cooling. Its 45.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Omak's frost-free season lasts about 160 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and December mark the typical warm and cold ends of the calendar in Omak's middle-range seasonal profile. The measured spread is 45.8°F. The annual average is 50°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Omak's cold-season load does not imply a wet climate. Annual precipitation is 11.6 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Omak wettest normal
December
December concentrates the scarce annual total (11.6 inches).
Omak driest normal
August
August is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Omak's climate
How dry is Omak? ▼
How many days above 90°F does Omak get? ▼
How much energy does heating and cooling require in Omak? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Omak's primary station: OMAK AP (USW00094197). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 5351340). Match rule for Omak: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Omak comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.