Climate and monthly weather forecastTualatin, OR
Climate and monthly weather forecast
The climate of Tualatin
Tualatin claims a Csb Köppen climate classification, frequently referred to as a Mediterranean warm summer climate. Located in Oregon, USA, this city dresses in a comfortable blend of climates throughout the year. Based on the climatological data taken on average for each month, the weather in Tualatin becomes an unfolding story of temperature, humidity, and daylight variations.Analyzing the wealth of numbers, attention is drawn immediately to the temperature changes spanning from a low of 34.5°F (1.4°C) in the coldest months to a high of 82°F (27.8°C) in summer. Humidity takes a slight descent from 84% at the beginning and end of the year to a minimum of 63% during summer. Rainfall pattern seems to be in sync with temperature highs and lows, accumulating the least inches of 0.31 in the peak of summer and a peak of 4.57" (116mm) in December. Snowfall, although minimal, graces Tualatin mostly in the early months of the year with a modest high of 1.57" (40mm) in February. Interestingly, snowfall days reach as high as 2.3 days in February but vanish from May to November.
Daylight hours fluctuate from 8.8 hours in the darkest month of December to a lengthy 15.6 hours in June. Sunshine hours mimic this pattern while the ultraviolet (UV) index climbs from two in the shadier months to a high of six in July. The city shrouds itself in cloud cover, ranging from a low of 22% cloudiness in high summer to a high of 58% in late winter. Air pressure remains relatively steady throughout the year, maintaining an average pressure of about 30.03 in.
The best time to visit Tualatin
When preferences lean towards warmth, rich sunshine, and lower chances of rain, the summer months from June to August stand to be the perfect season for visiting Tualatin. During these months, temperatures reach as high as 82°F (27.8°C), and daylight extends up to 15.6 hours with sunshine hours peaking at 11 hours in August. The relative humidity falls to a year-low of 63% during this season, proving ideal for outdoor activities.The worst time to visit Tualatin
For those hoping to avoid chills, lower sunlight, and high precipitation, it is advisable to refrain from visiting Tualatin from November to February. In these colder months, temperatures hover between 34.5°F (1.4°C) to 47.7°F (8.7°C) and daylight hours shrink to span between 8.8 to 10.4 hours. Additionally, these months score the highest precipitation, making them unsuitable for outdoor activities.Spring weather in Tualatin
The climate in Tualatin during spring (March, April, May) manifests itself slowly with a rise in temperature from 52.5°F (11.4°C) to 67.1°F (19.5°C). Humidity levels dwindle from 82% to 73% along with a gradual decrease in rainfall from 3.5" (89mm) to 1.69" (43mm), signifying the transition of seasons. Daylight and sunshine extend, allowing more hours to relish the awakening city.Summer weather in Tualatin
Tualatin in summer (June, July, August) boasts temperate warmth, seeing temperatures climb between 72.7°F (22.6°C) to 82°F (27.8°C). Humidity drops to pleasing rates of 70% to 63% respectively. Rainfall hits rock-bottom at 0.31" (8mm) in July, and snowfall is non-existent. Residents and visitors can indulge in long daylight hours, lasting from 14.9 to 15.6 hours per day.Autumn weather in Tualatin
Autumn (September, October, November) in Tualatin presents lower temperatures in the bracket of 74.3°F (23.5°C) to 50.9°F (10.5°C). Humidity starts to hike upwards from September with a range set between 69% to 83%. Rainfall sees a raise, bringing moisture back to the soil. The lengths of sunlight dwindle, and the landscape begins to shed leaves, paving the way for the next season.Winter weather in Tualatin
The meridian of winter (December, January, February) in Tualatin has temperatures drop to their lowest, scaling between 34.5°F (1.4°C) to 47.7°F (8.7°C). A steady level of 84% humidity dominates these winter months, provoking rainfall to hit its peak at 4.57" (116mm) in December. Snow makes a slight show in these months, adding to the winter charm of Tualatin. Daylight hours are at their shortest, making the winter nights long and bitterly cold.Weather in January
This month in Tualatin, Oregon sees a consistent chill in the air with thick, persistent cloud coverage. Humidity levels remain high, creating cool, damp conditions that epitomize Oregon's winter. Temperatures see a minimal rise from the 30s°F into the 40s°F throughout the day. Weather in January »Weather in February
February in Tualatin witnesses a subtle transition with slightly warmer temperatures and marginally reduced precipitation levels. The climate remains comfortably cool with high relative humidity and heavy cloud cover persists. Weather in February »Weather in March
As Tualatin transitions from winter to spring, March weather presents considerable improvements. Mute signs of warmer weather start appearing with temperatures advancing to the 50s°F during the day. Despite the semblance of a spring climate, expect consistent light showers contributing to the monthly average rainfall of 3.5" (89mm). Weather in March »Weather in April
The weather in April suggests a definite arrival of spring, marked by warming temperatures and lengthening daylight hours. As the chill begins to dissipate, Tualatin witnesses reprieve from the persistent rainfall, going down to 2.95" (75mm) for the month. Weather in April »Weather in May
In Tualatin, May paints a promising picture of the upcoming summer. This period exhibits clear shifts in the weather pattern with reduced rainfall, dropping to a mere 1.69" (43mm). The attendant rise in temperature starts drawing locals and visitors outdoors to soak in the increased hours of sunshine. Weather in May »Weather in June
June in Tualatin brings forth a significant change, signaling the arrival of summer. The average daily temperature inches towards the 70s°F, resulting in enhanced outdoor activity. The number of rainfall days significantly decreases owing to the dry season settling in. Weather in June »Weather in July
July is in the heart of summer with Tualatin experiencing its year-long peak temperature, warming up to 80.6°F (27°C). The city enjoys the highest level of sunshine and day length during this month, causing locals and tourists to flock to outdoor locations. Weather in July »Weather in August
In August, Tualatin swelters with temperatures soaring to a sizzling 82°F (27.8°C), marking the year’s hottest month. Despite the temperature, rainfall remains minimum, and cloud coverage lessens, making way for clear skies. Weather in August »Weather in September
September experiences a gentle decline in temperature, bringing relief from the oppressive summer heat. The change in climate is welcomed by farmers and gardeners alike, with rainfall levels gradually inching upwards to 1.57" (40mm). Weather in September »Weather in October
In Tualatin, October unveils the signals of the fast-approaching winter months. With the dropping temperature and prolonged rainfall, the shift towards cooler weather is apparent. The daylight hours rapidly shrink, and the higher levels of relative humidity foster the return of cloud-filled skies. Weather in October »Weather in November
November weather in Tualatin serves as a harbinger of Oregon's true winter season. The month carries a constant chill in the air with a noticeable decrease in daily sunshine hours. The increase in rainfall accumulation to 3.43" (87mm) and the rising humidity levels underscore the start of the colder season. Weather in November »Weather in December
December welcomes winter in full force in Tualatin, with the lowest average temperatures for the year down to 34.5°F (1.4°C). The days are shortest in this month, restricting outdoor activities as well as reducing visibility. Weather in December »Updated: Aug 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
January, February and December, with an average relative humidity of 84%, are most humid months.
Throughout the year, there are 170.9 rainfall days, and 30.67" (779mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 6.5 snowfall days, and 3.94" (100mm) of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the most snowfall is February, when snow falls for 2.3 days and typically aggregates up to 1.57" (40mm) 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.
April through October are months without snowfall.
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 5 days and typically collects 0.31" (8mm) of precipitation.
July is the month with the highest UV index, with an average maximum UV index of 6.
The warmest time of the year is August, with temperatures averaging a high of 82°F (27.8°C) and a low of 55°F (12.8°C).
August is the least humid month, with an average relative humidity of 63%.
The month with the most sunshine is August, with an average of 11h of sunshine.
The coldest period is December, when temperatures fluctuate between an average high of 44.1°F (6.7°C) and a low of 34.5°F (1.4°C).
The month with the most rainfall is December, when the rain falls for 18.9 days and typically aggregates up to 4.57" (116mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 48min of daylight.
Average temperature
Tualatin, OR
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure
Tualatin, OR
- Average pressure in January:
30.11"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:
30.03"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.04"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:
30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Tualatin, OR
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.3mph - Average wind speed in March:
5.2mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.2mph - Average wind speed in June:
4.2mph
- Average wind speed in July:
4.1mph - Average wind speed in August:
3.9mph - Average wind speed in September:
4mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5.3mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity
Tualatin, OR
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall
Tualatin, OR
- Average rainfall in January:
4.41" - Average rainfall in February:
3.31" - Average rainfall in March:
3.5" - Average rainfall in April:
2.95" - Average rainfall in May:
1.69" - Average rainfall in June:
1.38"
- Average rainfall in July:
0.31" - Average rainfall in August:
0.35" - Average rainfall in September:
1.57" - Average rainfall in October:
3.19" - Average rainfall in November:
3.43" - Average rainfall in December:
4.57"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days
Tualatin, OR
- Average rainfall days in January:
18.4 days - Average rainfall days in February:
16.4 days - Average rainfall days in March:
19.8 days - Average rainfall days in April:
18.6 days - Average rainfall days in May:
13.4 days - Average rainfall days in June:
10.9 days
- Average rainfall days in July:
5 days - Average rainfall days in August:
4.8 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
14.8 days - Average rainfall days in November:
19.1 days - Average rainfall days in December:
18.9 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.8 days).
Average snowfall
Tualatin, OR
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Tualatin, OR
- Average snowfall days in January:
1.3 days - Average snowfall days in February:
2.3 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:
0.4 days - Average snowfall days in December:
0.9 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Tualatin, 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 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 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 48min - Average sunshine in April:
7h and 36min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 30min
- 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 24min - Average sunshine in November:
4h and 42min - 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
Tualatin, OR
- Average sunshine days in January:
11.3 days - Average sunshine days in February:
8.6 days - Average sunshine days in March:
9.7 days - Average sunshine days in April:
9.3 days - Average sunshine days in May:
15.7 days - Average sunshine days in June:
16.8 days
- Average sunshine days in July:
25 days - Average sunshine days in August:
24.2 days - Average sunshine days in September:
18 days - Average sunshine days in October:
15.1 days - Average sunshine days in November:
9.7 days - Average sunshine days in December:
10.4 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.6 days).
Average UV index
Tualatin, 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
Tualatin, OR
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility
Tualatin, 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).
