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Dayville, OR Weather
Dayville, Oregon sits at 44.4668, -119.5322. Its warmest month is July, when the day usually reaches 92F, and its coldest is December, when the night usually falls to 27F. March is the wettest, with rain on about 11 days. The hottest day in the station record is 111F on June 29, 2021, and the coldest night -9F on December 8, 2013. 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 Dayville weather
Dayville sits at 44.4668, -119.5322 and covers about 0.526 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 Dayville
Dayville is warmest in July, when the day usually reaches 92F, and coldest in December, when the night usually falls to 27F. March is the wettest month, with rain on about 11 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
January
45F
28F
9
February
49F
29F
9
March
56F
33F
11
April
62F
37F
10
May
72F
44F
10
June
80F
50F
6
July
92F
56F
2
August
90F
55F
3
September
80F
48F
3
October
65F
40F
7
November
52F
32F
9
December
43F
27F
11
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the John Day 35 Wnw station 8.3 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.
Dayville weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Dayville: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Dayville weather records
In 22,888 days of observations Dayville has been as hot as 111F and as cold as -9F. Not averages: the actual days.
Hottest day
111F
June 29, 2021
Coldest night
-9F
December 8, 2013
Wettest day
1.45 in
May 18, 2004
NOAA GHCN daily station records, observed 2003 to 2025: temperature at the John Day 35 Wnw station, 8.3 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 Dayville weather
Common questions
What is the weather usually like in Dayville, OR?
Dayville is warmest in July, when the day usually reaches 92F, and coldest in December, when the night usually falls to 27F. Rain falls on roughly 90 days a year, most often in March. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Dayville, OR?
About 90 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. March is the wettest month with rain on about 11 of its days, and July the driest with about 2.
What is the hottest it has ever been in Dayville, OR?
The hottest day measured for Dayville reached 111F on June 29, 2021, and the coldest night -9F on December 8, 2013. Both are real NOAA station measurements from the GHCN daily archive, observed 2003 to 2025, at the John Day 35 Wnw station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Dayville, OR?
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 Dayville 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.