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Dallas, OR Weather
Dallas, Oregon sits at 44.9221, -123.3129. Its warmest month is August, when the day usually reaches 83F, and its coldest is January, when the night usually falls to 35F. January is the wettest, with rain on about 15 days. The hottest day in the station record is 111F on June 28, 2021, and the coldest night -11F on January 31, 1950. 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 Dallas weather
Dallas sits at 44.9221, -123.3129 and covers about 4.911 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 Dallas
Dallas is warmest in August, when the day usually reaches 83F, and coldest in January, when the night usually falls to 35F. January is the wettest month, with rain on about 15 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
47F
35F
15
0
February
51F
36F
13
0
March
56F
38F
14
0
April
61F
40F
13
0
May
68F
45F
9
0
June
73F
49F
6
0
July
82F
52F
2
0
August
83F
52F
2
0
September
78F
49F
6
0
October
64F
44F
10
0
November
52F
38F
14
0
December
46F
35F
15
0
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Dallas 2 Ne station 2 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.
Dallas weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Dallas: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Dallas weather records
In 126,309 days of observations Dallas has been as hot as 111F and as cold as -11F. Not averages: the actual days.
Hottest day
111F
June 28, 2021
Coldest night
-11F
January 31, 1950
Wettest day
4.32 in
December 22, 1964
Biggest snow
24.0 in
February 1, 1937
NOAA GHCN daily station records, observed 1928 to 2026: temperature at the Dallas 2 Ne station, 2 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 Dallas weather
Common questions
What is the weather usually like in Dallas, OR?
Dallas is warmest in August, when the day usually reaches 83F, and coldest in January, when the night usually falls to 35F. Rain falls on roughly 119 days a year, most often in January. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Dallas, OR?
About 119 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. January is the wettest month with rain on about 15 of its days, and July the driest with about 2.
What is the hottest it has ever been in Dallas, OR?
The hottest day measured for Dallas reached 111F on June 28, 2021, and the coldest night -11F on January 31, 1950. Both are real NOAA station measurements from the GHCN daily archive, observed 1928 to 2026, at the Dallas 2 Ne station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Dallas, 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 Dallas 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.