Climate and monthly weather forecastThe Dalles, OR
Climate and monthly weather forecast
The climate of The Dalles
The Dalles sits in the Csb climate zone as classified by the Köppen climate classification. This denotes a Mediterranean climate distinguished by warm summers. Geographically located in Oregon, USA, the town experiences notable shifts in weather parameters throughout its calendar year.Looking at the variance of temperature, the warmest month in The Dalles clearly is July with a median high at 81.7°F (27.6°C) and the lowest temperature observed in January at 28.2°F (-2.1°C). The maximal temperatures spread out from 38.1°F (3.4°C) to 81.7°F (27.6°C), while the minimal temperatures vary between 27.1°F (-2.7°C) and 55.8°F (13.2°C) throughout the year.
Relative humidity exhibits fluctuations in its range with the highest recorded in January and December at 85% and the lowest in July and August standing at 51%. Precipitation trends show disparities with the maximum rainfall of 2.99" (76mm) recorded in January and the minimum of 0.16" (4mm) in July. Snowfall is sporadic with the occasional sighting in December through February.
Regarding sun exposure, there is an increase from January's 4.8 hours to a peak of 12 hours in July. Days with sunshine extend from July till August, registering 26.8 and 26.3 days respectively. The shortest days are in December with 9.2 hours of daylight, compared to the most extensive day length in June with 15.6 hours.
The best time to visit The Dalles
Weather-wise, the most suitable time to tour The Dalles is in the summer season. Specifically, from June to August when the daylight is longest and the sunshine is at its peak. During these months, temperatures soar to their highest average of 72.1°F (22.3°C) to 81.7°F (27.6°C). Despite the warmer temperatures, the relative humidity drops to 51%, creating comfortable conditions for outdoor activities.The worst time to visit The Dalles
The months from January to February can present travelers with harsh weather conditions in The Dalles. These months report lower temperatures, which fall below freezing to 28.2°F (-2.1°C) and 29.5°F (-1.4°C) respectively. Furthermore, these winter months also register the highest rainfall levels, with January seeing up to 2.99" (76mm) and days of sunshine dropping to its lowest.Spring weather in The Dalles
Spring ushers in a steady rise in temperature from the chill of winter months in The Dalles. Starting from March and extending to May, average temperatures range from 37°F (2.8°C) to 43.3°F (6.3°C). The rain lessens with 1.97" (50mm) in March to 0.87" (22mm) in May. Spring sees a boost in daylight hours and an increase in sunshine, adding brightness to outdoor activities.Summer weather in The Dalles
Basking under the longest daylight hours and peak sunshine duration, summer in The Dalles is a season of warmth and cheer. The season spans from June to August. The average temperature grows to a comfortable range between 48.7°F (9.3°C) and 55.8°F (13.2°C). Lower humidity levels (between 51% and 60%) offset the heat, ensuring a cozy atmosphere for the town's inhabitants and visitors.Autumn weather in The Dalles
Autumn, from September to November, shows a cooling trend in The Dalles. Temperatures hover between 34.3°F (1.3°C) in November and 50.7°F (10.4°C) in September. Rainfall begins to increase again, doubling from 0.59" (15mm) in September to 1.69" (43mm) in November. The delightful autumn foliage adds to the charm of the location.Winter weather in The Dalles
Winter in The Dalles is characterized by a plunge in temperatures, from 27.1°F (-2.7°C) in December to 29.5°F (-1.4°C) in February. This season also results in reduced daylight, fewer sunny days, and increased precipitation and snowfall. Snow appears intermittently from December with 2.99" (76mm) to 0.31" (8mm) by February, adding a festive cover to the landscape.Weather in January
January in The Dalles, Oregon, typically sees snowy conditions with an average snowfall of 2.68" (68mm) in 3.5 days. Transitioning from the coldest time of the year, the climate gradually begins to warm up towards the end of the month. Weather in January »Weather in February
As February arrives, the weather conditions in The Dalles further improve from January. Although the average low temperature still remains below freezing, the environment starts to thaw, signaling a slow but definitive departure from the peak winter. Weather in February »Weather in March
March marks the onset of spring in The Dalles, Oregon, with a noticeable improvement in weather conditions compared to February. The entertainment shifts from snowfall to rainfall, reaching the third highest level of the year at 1.97" (50mm) spread over 16.3 days. Weather in March »Weather in April
The Dalles flips to a warmer, more pleasant climate in April, leaving behind the March rains. With about 1.26" (32mm) of rain falling over the course of 13.7 days, the frequency and magnitude of rainfall start to dwindle. The longer daylight hours till sunset provide additional joy for city residents and visitors. Weather in April »Weather in May
May signifies the farewell of spring and embraces the arrival of early summer in The Dalles, Oregon. Throughout May, the city experiences relatively lower rainfall of around 0.87" (22mm) spread across almost ten days. An increase in temperature and sunshine hours establishes a warm, bright, and comfortable environment. Weather in May »Weather in June
As the calendar turns to June, The Dalles enters the peak of its summer season. June boasts of minimal rainfall, measuring just 0.51" (13mm) over 6.9 days, hence offering the most dry days of the year. Residents enjoy long, sunny days and balmy weather conditions, perfect for indulging in a wide variety of outdoor pursuits. Weather in June »Weather in July
July represents the warmest month in The Dalles with maximum daytime temperatures reaching 81.7°F (27.6°C). It is coupled with an incredible 15.3 hours of daylight, making it the month with the most extended days. The minimal rainfall of 0.16" (4mm) makes the weather dry and sunny, bringing forth the epitome of perfect summer days. Weather in July »Weather in August
In August, The Dalles experiences similar weather conditions to July, albeit with a slight dip in maximum temperatures to 81.3°F (27.4°C). The dry spell continues making August the second driest month of the year, receiving merely 0.28" (7mm) of rain averaging over 3.2 days. Weather in August »Weather in September
September witnesses the beginning of a transition from hot summer days to the milder autumn temperatures in The Dalles. The decline in temperature is complemented by a slight increase in rainfall, reaching up to 0.59" (15mm). Weather in September »Weather in October
October in The Dalles heralds the full swing of fall with the temperatures dropping further, and the rainfall amounts increasing noticeably to 1.61" (41mm) over 13.1 days. However, instead of dampening the spirits, the soft drizzles add a refreshing touch to the crisp fall air, enhancing the scenic beauty. Weather in October »Weather in November
November marks the arrival of early winter in The Dalles, Oregon, with both temperatures and humidity on a steady climb from the preceding months. The weather conditions remain largely wet with the month witnessing rainfall amounts around 1.69" (43mm) over 14.6 days. Weather in November »Weather in December
In December, the Dalles transitions into the heart of winter. The highest snowfall post-Febrauary occurs in December, accumulating to approximately 2.99" (76mm) across 4.4 days. The increasing chill in the air indicates the approach of the Christmas season, transforming the city into a festive fairyland. Weather in December »Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January and December, with an average relative humidity of 85%, are most humid months.
The month with the most rainfall is January, when the rain falls for 16.2 days and typically aggregates up to 2.99" (76mm) of precipitation.
Throughout the year, there are 133.5 rainfall days, and 16.93" (430mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 14.3 snowfall days, and 11.06" (281mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 4.8h of sunshine.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the month with the most snowfall. Snow falls for 4.3 days and accumulates 4.29" (109mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
In The Dalles, snow does not fall in April through October.
June has the longest days of the year, with an average of 15h and 36min of daylight.
July, with its high-temperature average of 81.7°F (27.6°C) and a low-temperature average of 54.7°F (12.6°C), is the warmest month.
July and August, with an average relative humidity of 51%, are the least humid months.
July is the month with the least rainfall. Rain falls for 3.3 days and accumulates 0.16" (4mm) of precipitation.
With an average of 12h of sunshine, July has the most sunshine of the year.
July is the month with the highest UV index, with an average maximum UV index of 6.
With average temperatures fluctuating between a high of 37°F (2.8°C) and a low of 27.1°F (-2.7°C), December stands out as the coldest month.
December has the shortest days of the year, with an average of 8h and 48min of daylight.
Average temperature
The Dalles, OR
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (37°F).
The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure
The Dalles, OR
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.98"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed
The Dalles, OR
- Average wind speed in January:
4.8mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.5mph - Average wind speed in April:
6.5mph - Average wind speed in May:
6.5mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6mph - Average wind speed in September:
5.5mph - Average wind speed in October:
4.9mph - Average wind speed in November:
5mph - Average wind speed in December:
4.8mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity
The Dalles, OR
The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall
The Dalles, OR
- Average rainfall in January:
2.99" - Average rainfall in February:
2.13" - Average rainfall in March:
1.97" - Average rainfall in April:
1.26" - Average rainfall in May:
0.87" - Average rainfall in June:
0.51"
- Average rainfall in July:
0.16" - Average rainfall in August:
0.28" - Average rainfall in September:
0.59" - Average rainfall in October:
1.61" - Average rainfall in November:
1.69" - Average rainfall in December:
2.87"
The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days
The Dalles, OR
- Average rainfall days in January:
16.2 days - Average rainfall days in February:
14 days - Average rainfall days in March:
16.3 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
9.8 days - Average rainfall days in June:
6.9 days
- Average rainfall days in July:
3.3 days - Average rainfall days in August:
3.2 days - Average rainfall days in September:
6.9 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
14.6 days - Average rainfall days in December:
15.5 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).
Average snowfall
The Dalles, OR
The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
The Dalles, OR
- Average snowfall days in January:
3.5 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
1.6 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
4.4 days
The month with the highest number of snowfall days is December (4.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
The Dalles, OR
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
4h and 48min - Average sunshine in February:
5h and 0min - Average sunshine in March:
7h and 6min - Average sunshine in April:
9h and 48min - Average sunshine in May:
10h and 54min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 54min - Average sunshine in September:
10h and 42min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days
The Dalles, OR
- Average sunshine days in January:
11.6 days - Average sunshine days in February:
11.3 days - Average sunshine days in March:
10.6 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
18.4 days - Average sunshine days in June:
20.8 days
- Average sunshine days in July:
26.8 days - Average sunshine days in August:
26.3 days - Average sunshine days in September:
21.6 days - Average sunshine days in October:
15.9 days - Average sunshine days in November:
12 days - Average sunshine days in December:
12.1 days
The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index
The Dalles, OR
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
The Dalles, OR
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility
The Dalles, OR
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
