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Sunnyslope, WA Weather
Sunnyslope, Washington sits at 47.5048, -120.3532. Its warmest month is July, when the day usually reaches 89F, and its coldest is January, when the night usually falls to 26F. December is the wettest, with rain on about 10 days. The hottest day in the station record is 113F on June 30, 2021, and the coldest night -19F on December 30, 1968. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Sunnyslope weather
Sunnyslope sits at 47.5048, -120.3532 and covers about 7.999 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Radar: NOAA MRMS merged reflectivity, rendered into tiles by myweatherrock.
Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
What the weather is usually like in Sunnyslope
Sunnyslope is warmest in July, when the day usually reaches 89F, and coldest in January, when the night usually falls to 26F. December is the wettest month, with rain on about 10 days of it.
Usual high and low, by month
Days with rain, by month
The same year as numbers
Month
Usual high
Usual low
Rain days
Snow days
January
36F
26F
9
4
February
44F
28F
7
2
March
54F
34F
6
0
April
64F
41F
5
0
May
73F
49F
5
0
June
80F
56F
4
0
July
89F
62F
2
0
August
88F
61F
2
0
September
79F
52F
2
0
October
63F
42F
6
0
November
47F
32F
8
1
December
36F
27F
10
5
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Wenatchee station 5.6 miles away. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: computed from the station record, NOAA GHCN daily.
Sunnyslope weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Sunnyslope: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Sunnyslope weather records
In 136,648 days of observations Sunnyslope has been as hot as 113F and as cold as -19F. Not averages: the actual days.
Hottest day
113F
June 30, 2021
Coldest night
-19F
December 30, 1968
Wettest day
2.72 in
August 18, 1975
Biggest snow
23.0 in
January 6, 2022
NOAA GHCN daily station records, observed 1931 to 2026: temperature at the Wenatchee station, 5.6 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Sunnyslope weather
Common questions
What is the weather usually like in Sunnyslope, WA?
Sunnyslope is warmest in July, when the day usually reaches 89F, and coldest in January, when the night usually falls to 26F. Rain falls on roughly 66 days a year, most often in December. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Sunnyslope, WA?
About 66 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. December is the wettest month with rain on about 10 of its days, and July the driest with about 2.
Does it snow in Sunnyslope, WA?
Yes. Snow falls on about 12 days a year, most often in December, which averages about 5 snowy days. Those are days with measurable snowfall, not days with snow lying on the ground.
What is the hottest it has ever been in Sunnyslope, WA?
The hottest day measured for Sunnyslope reached 113F on June 30, 2021, and the coldest night -19F on December 30, 1968. Both are real NOAA station measurements from the GHCN daily archive, observed 1931 to 2026, at the Wenatchee station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Sunnyslope, WA?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Sunnyslope forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.