Climate and monthly weather forecastTroutdale, OR
Climate and monthly weather forecast
The climate of Troutdale
Troutdale, Oregon, USA is categorized under the Csb Köppen climate classification, which denotes a Mediterranean climate with warm summers. Nestled in a region where the consistent climate workings play a pivotal role, Troutdale experiences a characteristic capriciousness in its weather parameters throughout the year.Observing the temperature fluctuations, the city experiences a range from a high of 45°F (7.2°C) in January to a summit of 79.7°F (26.5°C) in August. Correspondingly, the low temperatures show a similar ebb and flow, starting at 34.3°F (1.3°C) in January and peaking at 52.7°F (11.5°C) by the same August month. Furthermore, Troutdale’s relative humidity tends to be on the higher side, with values fluctuating around 65% to 84%, with the least humid months falling during the summer season.
The city's rain showers display an intriguing arc that commences with a 5.47" (139mm) average in January, spirals down to a meager 0.31" (8mm) in July, and climbs its way back up to a substantial 5.63" (143mm) as December rolls in. Interestingly, the maximal rainfall tends to occur during the winter months, particularly in December. On the contrary, sunshine gracing Troutdale experiences a different cycle, extending from a humble 4.1 hours in February to an impressive 11 hours during the balmy days of August.
Regarding unique weather patterns, July emerges as a noteworthy month, boasting the least relative humidity and rainfall coupled with the highest number of sunshine days.
The best time to visit Troutdale
Judging by the patterns of temperature and sunshine, the best time to visit Troutdale would be during the summer months, from June to August. During this period, maximum temperatures remain in the pleasing bracket of 70.7°F (21.5°C) to 79.7°F (26.5°C). The city also enjoys an abundance of sunlight, ranging from 9.4 hours to a remarkable 11 hours per day, enhancing outdoor activities’ appeal. Simultaneously, the city experiences its lowest rainfall measures, making it a relatively dry period to explore and soak in Troutdale's charm.The worst time to visit Troutdale
Troutdale's winter period, specifically from November to February, may be considered a less favorable time for a visit. This judgement rests on several weather parameters: the temperatures steadily descend to their lowest points, sunshine hours dwindle down to their nadir, and the city witnesses the peak of its rainfall activity along with occasional snow.Spring weather in Troutdale
Troutdale's spring, spanning March to May, gradually warms up from the winter cold. A steady climb in temperatures can be observed within these months with highs moving from 50.9°F (10.5°C) to 65.8°F (18.8°C) and lows shifting from 36.5°F (2.5°C) to 42.6°F (5.9°C). Rainfall undergoes a slow decline, dwindling from 4.02" (102mm) in March to a lower 2.01" (51mm) by May. Sunshine progressively graces the city a bit more each day, reaching from 5.9 hours to 8.8 hours over the spring months.Summer weather in Troutdale
Troutdale welcomes a pleasantly warm summer, from June to August. The highs peak at 79.7°F (26.5°C) in August from the starting point of 70.7°F (21.5°C) in June. Correspondingly, the lows shift from 46.4°F (8°C) to 52.7°F (11.5°C) with considerable comfort. Rainfall plunges to its lowest level in the year, while sunshine hours stand at an impressive range witnessing up to 11 hours a day. The city experiences its least relative humidity during these months.Autumn weather in Troutdale
Autumn in Troutdale, spanning September to November, is characterized by a gradual drop in temperatures from the balmy summer numbers. High temperatures plummet from 72.5°F (22.5°C) in September to a cooler 50°F (10°C) by November. Lows follow suit with a decrease from 49.5°F (9.7°C) to 38.8°F (3.8°C). Rainfall begins its ascension, doubling from September to November. However, sunshine hours take a dip, retreating from about 9.3 hours a day to 4.6 hours.Winter weather in Troutdale
Winters in Troutdale, from December till February, usher in the chill with max temperatures plummeting to 45°F (7.2°C) in January and February from 43.3°F (6.3°C) in December. Lows too slump, fluctuating from 34.3°F (1.3°C) to 33.3°F (0.7°C). Winters bring on the city's highest rain showers ranging from 4.29" (109mm) to 5.63" (143mm), coupled with a marginal but notable snowfall. Sunshine hours remain low, approximately 4.2 hours per day, while humidity peaks, making winters damp and cold.Weather in January
In Troutdale, Oregon, January sees the beginning of the year with chilly weather, characteristic of the winter season. Moisture in the air is high during this time of the year, reflecting on the frequent precipitations, leading to average rainfall reaching 5.47" (139mm) and 1.3 snowfall days. Weather in January »Weather in February
Moving onward from January, the weather in Troutdale in February doesn’t change drastically. Still, precipitation slightly decreases compared to the previous month, with temperatures doing the opposite, albeit subtly. While snow becomes less frequent, rainfall does occur quite regularly. Weather in February »Weather in March
March sees a clear shift towards spring as told by the temperatures in Troutdale. It is during this time that snow occurrences become exceptionally rare, and humidity levels start to fall. Rainfall persists but its occurrence begins to decrease, hinting at more sunny periods ahead. Weather in March »Weather in April
April continues the warming trend observed in March in Troutdale. The temperature continues to rise, and snow is completely out of the forecast. The reduction in rainfall, down to an average of 3.5" (89mm), is noticeable compared to the previous month's 4.02" (102mm). Weather in April »Weather in May
May expresses the full vigor of spring; flowers bloom and temperatures rise in Troutdale. One noticeable characteristic of this month is a notable reduction in rainfall, with average precipitation dropping to 2.01" (51mm). As daylight time increases, sunshine becomes more frequent, resulting in an increase in UV indices. Weather in May »Weather in June
In Troutdale, June marks the arrival of summer along with a marked increase in temperatures. It's a month known for its long sunny hours and minimal rainfall. The vast reduction in rainfall, now as low as 1.61" (41mm), is a direct contrast to the weather just a few months ago. Weather in June »Weather in July
July is the month when Troutdale experiences the highest temperatures of the year. This peak of summer is known for clear, sunny days and a nearly negligible rainfall, with precipitation averaging only 0.31" (8mm), the lowest throughout the year. Weather in July »Weather in August
August in Troutdale maintains July's weather patterns with high temperatures and low rainfall, making it the second warmest month. The sunny days persist, with a relative decline in rainfall that is a characteristic of the summer season. Weather in August »Weather in September
With the arrival of September, Troutdale witnesses the early signs of autumn. The temperatures begin to descend from their summer highs and rainfall increases to 1.89" (48mm). The number of daylight hours gradually dwindles, hinting at the nearing winter. Weather in September »Weather in October
October marks the transition from summer to autumn in Troutdale, with observable changes in weather conditions. The frequency of rain increases significantly from September, with an average precipitation of 3.98" (101mm). Temperatures follow a downward trend and daylight hours start diminishing noticeably. Weather in October »Weather in November
November in Troutdale brings significant changes in the weather with temperature dropping further. Rainfall continues to increase, averaging 4.29" (109mm), as an establishment of the characteristic winter weather. The number of daylight hours continues to decrease. Weather in November »Weather in December
As the last month of the year, December in Troutdale is characterized by cold temperatures and an increase in precipitation. The first snowflakes start to appear in this month, marking the arrival of winter and averaging at 0.51" (13mm). Weather in December »Updated: Jun 16, 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
In Troutdale, during the entire year, the rain falls for 171 days and collects up to 37.2" (945mm) of precipitation.
January through March, November and December are months with snowfall.
In Troutdale, during the entire year, snow falls for 6.3 days and aggregates up to 4.37" (111mm) of snow.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the most humid month, with an average relative humidity of 84%.
The month with the most snowfall is February, when snow falls for 2.2 days and typically aggregates up to 1.54" (39mm) of snow.
With an average of 4.1h of sunshine, February has the least sunshine of the year.
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 Troutdale, snow does not fall in April through October.
The month with the longest days is June, with an average of 15h and 36min of daylight.
The month with the least rainfall is July, when the rain falls for 4.9 days and typically collects 0.31" (8mm) of precipitation.
July is the month with the highest UV index in Troutdale, with an average maximum UV index of 6.
In Troutdale, the average temperatures in August are the highest, with a peak at 79.7°F (26.5°C) and a low of 52.7°F (11.5°C).
August is the least humid month, with an average relative humidity of 65%.
The month with the most sunshine is August, with an average of 11h of sunshine.
December is the coldest month, exhibiting average temperatures of 43.3°F (6.3°C) at the peak and 33.3°F (0.7°C) at the base.
The month with the most rainfall is December, when the rain falls for 19 days and typically aggregates up to 5.63" (143mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 48min of daylight.
Average temperature
Troutdale, OR
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (43.3°F).
The month with the highest average low temperature is August (52.7°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure
Troutdale, OR
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
30.02"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Troutdale, OR
- Average wind speed in January:
6.8mph - Average wind speed in February:
6.1mph - Average wind speed in March:
5.5mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.2mph - Average wind speed in June:
3.9mph
- Average wind speed in July:
3.7mph - Average wind speed in August:
3.5mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.8mph - Average wind speed in November:
6.1mph - Average wind speed in December:
6.3mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity
Troutdale, OR
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall
Troutdale, OR
- Average rainfall in January:
5.47" - Average rainfall in February:
4.06" - Average rainfall in March:
4.02" - Average rainfall in April:
3.5" - Average rainfall in May:
2.01" - Average rainfall in June:
1.61"
- Average rainfall in July:
0.31" - Average rainfall in August:
0.43" - Average rainfall in September:
1.89" - Average rainfall in October:
3.98" - Average rainfall in November:
4.29" - Average rainfall in December:
5.63"
The wettest month (with the highest rainfall) is December (5.63").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days
Troutdale, OR
- Average rainfall days in January:
18.6 days - Average rainfall days in February:
17 days - Average rainfall days in March:
19.6 days - Average rainfall days in April:
18.6 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
11.1 days
- Average rainfall days in July:
4.9 days - Average rainfall days in August:
4.1 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
15.2 days - Average rainfall days in November:
18.5 days - Average rainfall days in December:
19 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (4.1 days).
Average snowfall
Troutdale, OR
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Troutdale, OR
- Average snowfall days in January:
1.3 days - Average snowfall days in February:
2.2 days - Average snowfall days in March:
1.4 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:
0.9 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Troutdale, 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 12min - Average sunshine in February:
4h and 6min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
11h and 0min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 30min - Average sunshine in November:
4h and 36min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days
Troutdale, OR
- Average sunshine days in January:
10.8 days - Average sunshine days in February:
8.6 days - Average sunshine days in March:
9.5 days - Average sunshine days in April:
9.1 days - Average sunshine days in May:
15.3 days - Average sunshine days in June:
17.3 days
- Average sunshine days in July:
24.4 days - Average sunshine days in August:
25.3 days - Average sunshine days in September:
17.9 days - Average sunshine days in October:
15 days - Average sunshine days in November:
10.4 days - Average sunshine days in December:
10.5 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index
Troutdale, 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
Troutdale, OR
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility
Troutdale, OR
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
