Olga (2 mi SE), Washington climate: Climate normals at a NOAA weather station
Olga (2 mi SE)'s normal year runs from 38°F December nights to 69°F July afternoons, with 29.2 inches of precipitation and 6 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.4°C, December lows of 3°C, July highs of 21°C, 741 mm of precipitation a year.
- NOAA stationOlga (2 mi SE)
- Station IDUSC00456096
- Location48.61°N 122.81°W
- Elevation80 ft (24 m)
On October 23, the normal high in Olga (2 mi SE) is 54°F and the normal low 46°F, and the chance of measurable rain or snow is 42%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Olga (2 mi SE).
- Jan 44° 38°
- Feb 46° 39°
- Mar 50° 41°
- Apr 56° 44°
- May 62° 48°
- Jun 65° 51°
- Jul 69° 54°
- Aug 69° 54°
- Sep 65° 51°
- Oct 56° 47°
- Nov 49° 42°
- Dec 44° 38°
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 Olga (2 mi SE) each month?
July is the warmest month, with normal highs of 69°F; December the coldest, with normal lows of 38°F. The most precipitation falls in November (4.58 in), the least in July (0.71 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 44°F | 38°F | 41.0°F | 3.95 | 1.8 | 15 | <1 | 9 | 8 h 40 min |
| February | 46°F | 39°F | 42.5°F | 2.60 | 0.4 | 11 | <1 | 6 | 10 h 10 min |
| March | 50°F | 41°F | 45.5°F | 2.63 | 0.1 | 14 | <1 | 3 | 11 h 50 min |
| April | 56°F | 44°F | 49.7°F | 2.07 | 0.0 | 11 | <1 | 1 | 13 h 40 min |
| May | 62°F | 48°F | 54.5°F | 1.68 | 0.0 | 9 | <1 | <1 | 15 h 10 min |
| June | 65°F | 51°F | 58.1°F | 1.27 | 0.0 | 7 | <1 | <1 | 16 h 10 min |
| July | 69°F | 54°F | 61.7°F | 0.71 | 0.0 | 4 | <1 | <1 | 15 h 50 min |
| August | 69°F | 54°F | 61.7°F | 1.00 | 0.0 | 5 | <1 | <1 | 14 h 30 min |
| September | 65°F | 51°F | 58.2°F | 1.62 | 0.0 | 7 | <1 | <1 | 12 h 40 min |
| October | 56°F | 47°F | 51.6°F | 3.24 | 0.1 | 12 | <1 | <1 | 10 h 50 min |
| November | 49°F | 42°F | 45.0°F | 4.58 | 0.6 | 15 | <1 | 4 | 9 h 20 min |
| December | 44°F | 38°F | 40.6°F | 3.83 | 2.8 | 15 | <1 | 8 | 8 h 20 min |
| Year (annual) | 56°F | 46°F | 50.8°F | 29.18 | 5.8 | 125 | <1 | 32 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | 3°C | 5.0°C | 100 mm | 5 cm |
| February | 8°C | 4°C | 5.8°C | 66 mm | 1 cm |
| March | 10°C | 5°C | 7.5°C | 67 mm | 0 cm |
| April | 13°C | 7°C | 9.8°C | 53 mm | 0 cm |
| May | 16°C | 9°C | 12.5°C | 43 mm | 0 cm |
| June | 18°C | 11°C | 14.5°C | 32 mm | 0 cm |
| July | 21°C | 12°C | 16.5°C | 18 mm | 0 cm |
| August | 21°C | 12°C | 16.5°C | 25 mm | 0 cm |
| September | 18°C | 11°C | 14.6°C | 41 mm | 0 cm |
| October | 14°C | 8°C | 10.9°C | 82 mm | 0 cm |
| November | 9°C | 5°C | 7.2°C | 116 mm | 2 cm |
| December | 6°C | 3°C | 4.8°C | 97 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00456096; 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 Olga (2 mi SE)?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, July 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 USC00456096.
When is the last frost at Olga (2 mi SE)?
In Olga (2 mi SE), the last spring frost (32°F) comes after February 26 in half of years and after March 23 in one year in ten; the first autumn frost comes before November 29 in half of years and before November 10 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 23; 9 in 10 after January 23
- First autumn frost, half of years before
- November 291 year in 10 before November 10; 9 in 10 before December 23
NOAA puts the median frost-free season at 276 days, and the season without a hard freeze (28°F) at 328 days.
A hard freeze (28°F) comes after January 26 in half of springs and before December 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Olga (2 mi SE) in zone 8b in ZIP code 98279, 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 20°F (22 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00456096; 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 Olga (2 mi SE)?
In a normal year in Olga (2 mi SE), a 90°F day is rare, 32 nights fall to 32°F or colder and 125 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 32a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 125a normal year
- Days with 1 inch of snow or more
- 2a normal year
The highest temperature in this station's record (since 1891) is 93°F, on July 29, 2009; the lowest is −4°F, on February 2, 1893.
The wettest calendar year on that record is 1917, with 37.89 in; the snowiest season is 1915–16, with 51.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00456096; records: ACIS (NOAA Regional Climate Centers), station USC00456096. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Olga (2 mi SE)?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Olga (2 mi SE), 3.5 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (51%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.0 |
| February | 61% | 1.9 |
| March | 61% | 2.9 |
| April | 67% | 4.3 |
| May | 71% | 5.5 |
| June | 72% | 6.0 |
| July | 82% | 6.5 |
| August | 81% | 5.5 |
| September | 76% | 3.9 |
| October | 64% | 2.2 |
| November | 55% | 1.1 |
| December | 51% | 0.8 |
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 Olga (2 mi SE) record?
A normal year at Olga (2 mi SE) brings 5,174 heating degree days, 4% fewer than the median U.S. place (5,373), and 30 cooling degree days, 97% 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 1,517 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 744 | 0 |
| February | 630 | 0 |
| March | 603 | 0 |
| April | 458 | 0 |
| May | 324 | 0 |
| June | 210 | 3 |
| July | 117 | 15 |
| August | 113 | 11 |
| September | 206 | 2 |
| October | 416 | 0 |
| November | 600 | 0 |
| December | 755 | 0 |
| Year (annual) | 5,174 | 30 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00456096. 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 Olga (2 mi SE) been warmer than normal?
Over 104 complete years from 1893 to 2015, the station's annual mean temperature rose at a fitted 2.3°F per century (+0.13°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Olga (2 mi SE)'s climate compare?
Olga (2 mi SE) is warmer than 52 of the 96 places with their own NOAA record in Washington, and wetter than 51. Across the 7,247 U.S. stations with normals, its annual mean of 50.8°F is warmer than 44%.
In the Köppen classification computed from these normals, Olga (2 mi SE) is Csb: temperate, dry-summer, warm 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 Olga (2 mi SE)'s climate
What is the coldest month at Olga (2 mi SE)?
December, with a normal high of 44°F and a normal low of 38°F. The warmest is July (69°F by day, 54°F at night).
Does it snow at Olga (2 mi SE)?
Yes: 6 inches in a normal year, falling on 3 days with 0.1 inch or more, the most in December (2.8 inches).
What is the rainiest month at Olga (2 mi SE)?
November, with 4.58 in of precipitation in a normal year; the driest is July with 0.71 in.
What plant hardiness zone is Olga (2 mi SE) in?
The USDA's 2023 map puts Olga (2 mi SE) in zone 8b in ZIP code 98279, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 20°F (22 years, 1991-2020): zone 9a.
How late can frost come at Olga (2 mi SE)?
In half of years the last 32°F night comes after February 26; in one year in ten it comes after March 23. Waiting until March 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Washington climateThe statewide normals and every place in the state
- Anacortes, WA11 miles from this station, 52.8°F a year
- Friday Harbor, WA12 miles from this station, 50.9°F a year
- Bellingham, WA17 miles from this station, 51.2°F a year
- Whidbey Island Naval Air Station, WA19 miles from this station, 52.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made