Climate and monthly weather forecastDallas, OR
Climate and monthly weather forecast
The climate of Dallas
Dallas, located in Oregon, USA, is characterized by a Mediterranean climate with warm summers, denoted by the Köppen climate classification as Csb. The general climate conditions are marked by moisture-laden winters and dry summers.Throughout the year, Dallas experiences a fair range in temperatures, from an annual low average of 34°F (1.1°C) to a maximum average of 80.2°F (26.8°C). This differentiation can be attributed to the geographic location, atmospheric pressure, and seasonal variations. Examining the relative humidity, Dallas records a minor deviation from 70% to 89% across the full year. The visibility in Dallas sees minimal variation, staying consistent around 4 to 5 miles.
Perhaps one of the most notable features of Dallas weather is the relatively high rainfall rates during the winter months, with December seeing the highest rainfall at 2.4" (61mm). The number of rainfall days is fairly stable, staying between 3.9 and 17.4. As for snow, Dallas experiences a light dusting primarily in February, evidenced by a snowfall of 1.18" (30mm). Snowfall days are few and far between, with less than one day on average per month.
The best time to visit Dallas
Unfolding the extensive weather patterns of Dallas, the months of May to August surface as an excellent time for visitors. The weather during these months is relatively warm with high temperatures ranging from 57.2°F (14°C) to 80.2°F (26.8°C), perfect for outdoor activities. Coupled with the highest recorded sunlight of up to 15.7 hours per day during June and the highest average sunshine hours of 10.8 during both July and August, it provides an ideal setting to explore Dallas.The worst time to visit Dallas
While Dallas offers a charming weather spectrum throughout the year, the period from November to March might cause a few challenges for visitors. These months are characterized by colder temperatures, descending as low as 34°F (1.1°C). Moreover, the higher precipitation with rainfall peaking at 2.4" (61mm) in December, combined with the reduced daylight hours, might not be conducive for outdoor activities.Spring weather in Dallas
Spring in Dallas, extending from March to May, ushers in gradually warming temperatures. March records temperatures between 36.7°F (2.6°C) and 51.4°F (10.8°C), while May registers a higher temperature range from 42.4°F (5.8°C) to 65.3°F (18.5°C). Rainfall during spring progressively decreases from 1.85" (47mm) in March to as low as 0.98" (25mm) by May.Summer weather in Dallas
Summers in Dallas, beginning in June through to August, present warm temperatures, with August being the hottest month with a high average of 80.2°F (26.8°C). Rainfall is notably minimal with July seeing the least precipitation of 0.24" (6mm). This period also boasts extended daylight hours up to 15.6 hours in June, and the highest recorded sunshine hours of 8.2 to 10.8 hours per day.Autumn weather in Dallas
Autumn, encompassing September to November, witnesses a gradual decrease in temperatures from a high of 72.7°F (22.6°C) in September to a lower high of 50.5°F (10.3°C) in November. Rainfall starts to increase during this period, with November bringing 1.54" (39mm). It is during Autumn that the daylight hours start to decrease, from 12.5 hours in September to 9.6 hours in November.Winter weather in Dallas
The winter months of December through to February introduce colder temperatures, with February being the coldest month recording an average low temperature of 34.7°F (1.5°C). Rainfall during this period is significant, reaching up to 2.4" (61mm) in December. Snowfall, while minimal, is most evident in February with 1.18" (30mm). During winter, daylight hours are at their shortest, with December seeing an average of 8.8 daylight hours in a day.Weather in January
Dallas, Oregon’s coldest month, January, is characterized by lengthy spells of dark and cloudy skies with limited sunlight and periodic rain showers. Low temperatures from 35.1°F (1.7°C) to the high of 46.2°F (7.9°C) define this month. Weather in January »Weather in February
Weather in February experiences a slight improvement from the preceding month, with a moderate rise in temperature and marginally longer daylight hours. The month's temperature range is 34.7°F (1.5°C) to 47.7°F (8.7°C), with occasional showers contributing 1.73" (44mm) of rainfall. Weather in February »Weather in March
March marks a transition in Dallas's weather from winter to spring. The month experiences a visible drop in rainfall, marginally higher temperatures, and increased daylight hours. A relatively high temperature range from 36.7°F (2.6°C) to 51.4°F (10.8°C) and 1.85" (47mm) of rain indicates moderate weather. Weather in March »Weather in April
The weather in Dallas, Oregon, takes a significant turn in April. The month is characterized by lush green landscapes and temperatures that start inching towards warmth. April’s temperature exhibits a notable increase, varying from 38.1°F (3.4°C) to 57.2°F (14°C). Weather in April »Weather in May
The arrival of May signals the onset of warmer weather in Dallas, with moderately high temperatures and extended daylight hours. Abundant sunshine coupled with the temperature range of 42.4°F (5.8°C) to 65.3°F (18.5°C) brings life to the city. Weather in May »Weather in June
June's weather in Dallas, Oregon, is marked by the display of vibrant greenery, warm temperatures, and significantly longer daylight hours. From the temperature lows of 46.6°F (8.1°C) to the highs of 70.7°F (21.5°C), the month brings more sunshine days and less rainfall, measuring only 0.75" (19mm). Weather in June »Weather in July
July, the height of summer in Dallas, Oregon, is largely dry, warm, and sunny. The highest temperatures are noticed in this month, ranging from 50.9°F (10.5°C) to 78.4°F (25.8°C). Despite only 0.24" (6mm) of rainfall, it does not hamper the city's lively summer activities. Weather in July »Weather in August
Following July, August continues the trend of dry and sunny conditions in Dallas, Oregon. Warmer temperatures from 52.3°F (11.3°C) up to 80.2°F (26.8°C) and scanty rainfall of 0.28" (7mm) prevail during this month. The subtropical high-pressure system maintains a consistently sunny and warm weather pattern, providing favourable conditions for outdoor sports and recreational activities. August, with average temperatures reaching a high of 80.2°F (26.8°C) and a low of 52.3°F (11.3°C), is the warmest month. Weather in August »Weather in September
September marks the transition from summer to autumn in Dallas, Oregon. The dropping temperature, ranging from 49.3°F (9.6°C) to 72.7°F (22.6°C), is complemented by continuing dry conditions with only 0.79" (20mm) of rainfall. Weather in September »Weather in October
In October, Dallas, Oregon, fully transitions into autumn with noticeable changes in weather. The falling leaves, pumpkin harvests, and temperatures ranging from 44.4°F (6.9°C) to 60.8°F (16°C) define the month. With a slight increase in rainfall, amounting to 1.22" (31mm), the city takes on a beautiful fall palette, making it an exceptional month for photography and nature walks. The beginning of October marks a decrease in the average high-temperature, transitioning from a pleasant 72.7°F (22.6°C) in September to an enjoyable 60.8°F (16°C). Weather in October »Weather in November
November in Dallas, Oregon, witnesses the onset of colder weather and a significant increase in rainfall from the preceding month, amounting to 1.54" (39mm). With temperatures further dropping, from 39°F (3.9°C) to 50.5°F (10.3°C), the city sees shorter daylight hours. Weather in November »Weather in December
December in Dallas, Oregon, is mainly characterized by the chills of winter, frequent rain showers, and occasional snowfall. During December, the temperature can drop down to 34°F (1.1°C) while reaching heights of 44.2°F (6.8°C). Weather in December »Updated: Jun 4, 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
Throughout the year, there are 139.9 rainfall days, and 15.39" (391mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 3.7 snowfall days, and 2.05" (52mm) of snow is accumulated.
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 1.5 days and accumulates 1.18" (30mm) of snow.
February has the least sunshine of the year, with an average of 3.7h of sunshine.
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 Dallas, snow does not fall in April through October.
June has the longest days of the year in Dallas, with an average of 15h and 30min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 5.
The month with the least rainfall is July, when the rain falls for 4.2 days and typically collects 0.24" (6mm) of precipitation.
The months with the most sunshine are July and August, with an average of 10.8h of sunshine.
Dallas registers the average highest temperatures during August, with peaks of 80.2°F (26.8°C) and lows of 52.3°F (11.3°C).
August is the least humid month, with an average relative humidity of 69%.
Dallas, Oregon, witnesses the coldest weather in December, with temperatures averaging a high of 44.2°F (6.8°C) and a low of 34°F (1.1°C).
The most humid month in Dallas is December, with an average relative humidity of 89%.
The month with the most rainfall in Dallas is December, when the rain falls for 15.7 days and typically aggregates up to 2.4" (61mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 48min of daylight.
Average temperature
Dallas, OR
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (44.2°F).
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure
Dallas, OR
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.05"Hg
- Average pressure in July:
30.05"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Dallas, OR
- Average wind speed in January:
4.8mph - Average wind speed in February:
4.8mph - Average wind speed in March:
5mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.2mph
- Average wind speed in July:
4.2mph - Average wind speed in August:
3.9mph - Average wind speed in September:
4mph - Average wind speed in October:
4.4mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.6mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity
Dallas, OR
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (69%).
Average rainfall
Dallas, OR
- Average rainfall in January:
2.09" - Average rainfall in February:
1.73" - Average rainfall in March:
1.85" - Average rainfall in April:
1.54" - Average rainfall in May:
0.98" - Average rainfall in June:
0.75"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.28" - Average rainfall in September:
0.79" - Average rainfall in October:
1.22" - Average rainfall in November:
1.54" - Average rainfall in December:
2.4"
The wettest month (with the highest rainfall) is December (2.4").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Dallas, OR
- Average rainfall days in January:
13.8 days - Average rainfall days in February:
13.5 days - Average rainfall days in March:
17.4 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
11.7 days - Average rainfall days in June:
9.8 days
- Average rainfall days in July:
4.2 days - Average rainfall days in August:
3.9 days - Average rainfall days in September:
8.8 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
13.4 days - Average rainfall days in December:
15.7 days
The month with the highest number of rainy days is March (17.4 days).
The month with the least rainy days is August (3.9 days).
Average snowfall
Dallas, OR
The month with the highest snowfall is February (1.18").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Dallas, OR
- Average snowfall days in January:
0.8 days - Average snowfall days in February:
1.5 days - Average snowfall days in March:
0.7 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:
0.2 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Dallas, OR
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 48min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
3h and 42min - Average sunshine in March:
5h and 12min - Average sunshine in April:
6h and 48min - Average sunshine in May:
8h and 12min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 48min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 18min - Average sunshine in November:
4h and 24min - Average sunshine in December:
3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days
Dallas, OR
- Average sunshine days in January:
14.9 days - Average sunshine days in February:
12 days - Average sunshine days in March:
11.6 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
16.9 days - Average sunshine days in June:
17.9 days
- Average sunshine days in July:
26.1 days - Average sunshine days in August:
24.4 days - Average sunshine days in September:
19.4 days - Average sunshine days in October:
17.2 days - Average sunshine days in November:
15 days - Average sunshine days in December:
14 days
The month with the most sunshine days is July (26.1 days).
The month with the least sunshine days is March (11.6 days).
Average UV index
Dallas, OR
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Dallas, OR
The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
Dallas, OR
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
