Climate and monthly weather forecastPasco, WA
Climate and monthly weather forecast
The climate of Pasco
Residing in the Mid-latitude steppe, Pasco, Washington lies within the Köppen climate classification of BSk. Taking a comprehensive glimpse at the yearly weather patterns one will notice significant variations in different weather parameters. The temperature fluctuates considerably from highs hovering around 39°F (3.9°C) in January, gradually increasing to the maximum around 90°F (32.2°C) in July, and then falling back to approximately 37.8°F (3.2°C) in December. Minimal temperatures follow a somewhat similar pattern varying from about 28.8°F (-1.8°C) in January to 64°F (17.8°C) in August.On another note, the amount of rainfall throughout the year is moderate and varies distinctly between months. The levels range from lows of 0.2" (5mm) in July to peaking around 0.94" (24mm) in both January and March. This isn't constant though, Pasco experiences upwards of 12.8 rainfall days in March, the highest year-round, while the driest month is July with only 3.8 rainfall days.
The months of January and February show a unique weather pattern with snowfall of 0.94" (24mm) and 2.09" (53mm) respectively. However, this event is short-lived as no other month records any snowfall. Equivalently, the wind speed, cloud cover, and pressure subtly change throughout the year without any general pattern. Towards the end of the year, relative humidity and UV index reaches maximum values while it dims down around mid-year.
The best time to visit Pasco
For those who prefer mild weather and moderate outdoor conditions, the most favorable time to travel to Pasco, Washington is from May to August. May commences with an average high temperature of 73°F (22.8°C), hitting its peak at 90°F (32.2°C) in July, and gradually diminishing to 77.9°F (25.5°C) in September. During this period, the sky is clearer with average cloud cover ranging from 10% to 26% while UV index varies between 4 to 7. Moreover, relative humidity drops down to its lowest, hence less moisture in the air. However, the top deciding factor would unquestionably be rainfall or the lack of it. These summer months typically experience less precipitation with the lowest recorded rainfall of 0.2" (5mm) in July.The worst time to visit Pasco
When looking at the city’s climatic conditions, the most unfavorable time for a visit to Pasco would arguably be the winter months of January and February. During this time, the city experiences colder temperatures plummeting to as low as 28.8°F (-1.8°C) coupled with higher humidity levels of 78% to 80% increasing the chill in the air. It also breaks ground for snowfall, with 0.94" (24mm) in January followed by 2.09" (53mm) in February marking the city's unique event of snowfall. Moreover, visitors may find less daylight hours constraining, with approximately 6 sunshine hours per day, making the outdoor activities limited.Spring weather in Pasco
Spring in Pasco, encompassing the months of March, April, and May, sees a steady rise in temperatures, culminating to an average high of 73°F (22.8°C) in May. The rain starts to taper off from 0.91" (23mm) in March to 0.51" (13mm) by April, translating to around 10 rainfall days, leading to drier conditions. Correspondingly, sunshine hours expand from 7.6 hours in March to 11 hours in May. The pleasant combination of increasing temperatures, diminishing rain, and extended hours of sunshine makes this season ideal for outdoor activities.Summer weather in Pasco
Hailed as the peak season for a visit, the Pasco summer stretches from June through August. The temperature ranges from 80.1°F (26.7°C) in June to 90°F (32.2°C) in July, keeping the weather warm but not oppressive. Rainfall gets to its lowest point at 0.2" (5mm) in July and there's only 3.8 rainfall days, offering ample opportunity for exploring the outdoors. The maximum average daylight during this period, peaking at 15.7 hours in June, ensures plenty of time to enjoy the city's activities.Autumn weather in Pasco
The arrival of fall in Pasco begins in September and extends through November, characterized by a gradual dip in temperatures from 77.9°F (25.5°C) to 48.7°F (9.3°C). Despite this, the weather remains relatively pleasant. Rain begins to pick up gradually from 0.28" (7mm) of rain in September to 0.63" (16mm) in November. However, the increase of cloud cover from 16% to 35% indicates the forthcoming winter.Winter weather in Pasco
Winter in Pasco is typically cold with temperatures hovering around 39°F (3.9°C) in December and decreasing slightly to 37.8°F (3.2°C) by February. This season witnesses the unique occurrence of snowfall, specifically in January and February, with 0.94 and 2.09" (53mm) respectively. Relative humidity reaches its crest during these months, adding a certain chill to the air. Limited daylight with 5.5 hours of sun in December and January, contracting further to 5.4 hours in February, creates a shorter window for outdoor activity. This season is perfect for visitors who cherish the beauty of a snowy landscape.Weather in January
The winter chill continues into January in Pasco, Washington, making it the coldest month of the year on record. Expect layers of clothing and heated rooms indispensable for January nights. Snowfall is infrequent but possible with 0.94" (24mm) average being recorded. Weather in January »Weather in February
February invites the first whisper of spring, even as wintry scents linger in the air. Subtle changes, like longer daylight hours and fewer snowfall days, spark hopes of the approaching season. The most significant February feature is the peak in snowfall at 2.09" (53mm) on average. Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Pasco, Washington, with an average temperature ranging between max 54.1°F (12.3°C) and min 38.3°F (3.5°C). The start of March brings a rise in the average high-temperature, moving from a frosty 44.8°F (7.1°C) in February to a fresh 54.1°F (12.3°C). Weather in March »Weather in April
April marks the arrival of spring in Pasco, accompanied by fresh blossoms and spring showers. A notable transitioning month, April makes the city abuzz with its colorful landscapes and burgeoning wildlife, a stark contrast to the earlier winter months. Weather in April »Weather in May
The weather in May shifts towards the warmer side, with the landscape flourishing under the increased sunshine. The city is ebullient with the magic of late spring, the parks and gardens being a spectacle of colors. The arrival of consistent warm weather becomes clearer, with individuals swapping sweaters for lighter fabrics. Weather in May »Weather in June
June in Pasco signals the start of summer, bringing with it warmer days and recreational prospects. Traces of spring's vibrancy persist, merging with summer's allure to embody a time of enjoyment and relaxation. With longer days, opportunities for outdoor pursuits multiply, highlighting the city's attributes. Weather in June »Weather in July
The sunny season reaches its apex in July, Pasco's warmest month, with temperatures soaring to an average high of 90°F (32.2°C). It's an ideal time to explore the city, basked in sunlight and vibrant energy. A dramatic drop in rainfall characterizes July, making it the driest month of the year, perfect for outdoor activities. Weather in July »Weather in August
August continues the summer spell with temperatures nearly matching July's heat. Cloud cover and humidity remain low, ensuring ample sunshine throughout the city. The heat doesn't subside in August, keeping pool and beach activities relevant. Weather in August »Weather in September
As the season transitions from summer to autumn, September in Pasco becomes a symbol of change. The landscape begins to show signs of the approaching fall, with foliage turning to shades of gold and orange. The weather remains warm, but with a perceptible decrease from its summer high. Weather in September »Weather in October
In October, Pasco fully embraces the autumn season, displaying an array of warm colors and crisp air. The weather starts to cool, with temperatures falling further, but remain moderate enough for outdoor exploration. As daylight hours shorten, the city begins to wear a calmer and quieter demeanor. Weather in October »Weather in November
November heralds the onset of winter, with a noticeable decline in temperatures. However, remnants of fall persist, adding charm to the cityscape. The autumn colors gradually transition to winter hues, symbolizing the changing season. Weather in November »Weather in December
December sees the return of winter, plummeting temperatures, and an increase in indoor activities. Cloud cover increases, further lowering temperatures, and bringing an unmistakable wintry chill. Snowfall enters the scene again at 0.91" (23mm), adding to the seasonal charm, rendering the city into a winter wonderland. Weather in December »Updated: Jun 8, 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
With an average relative humidity of 80%, January is the most humid month.
January is the month with the most rainfall. Rain falls for 11.4 days and accumulates 0.94" (24mm) of precipitation.
Throughout the year, there are 101.7 rainfall days, and 7.36" (187mm) of precipitation is accumulated.
January through March, November and December are months with snowfall.
Throughout the year, there are 11 snowfall days, and 4.53" (115mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 5.4h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the month with the most snowfall. Snow falls for 3.3 days and accumulates 2.09" (53mm) 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 Pasco, snow does not fall in April through October.
The month with the longest days is June, with an average of 15h and 42min of daylight.
July is the month when Pasco sees the average highest temperatures, with a high of 90°F (32.2°C) and a low of 62.6°F (17°C).
The least humid month is July, with an average relative humidity of 35%.
The month with the least rainfall in Pasco is July, when the rain falls for 3.8 days and typically collects 0.2" (5mm) of precipitation.
The month with the most sunshine is July, with an average of 12.1h of sunshine.
July is the month with the highest UV index, with an average maximum UV index of 7.
December brings the lowest temperatures, with an average high of 37.8°F (3.2°C) and an average low of 27.7°F (-2.4°C).
The month with the shortest days is December, with an average of 8h and 42min of daylight.
Average temperature
Pasco, WA
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is December (37.8°F).
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (27.7°F).
Average pressure
Pasco, WA
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed
Pasco, WA
- Average wind speed in January:
6.2mph - Average wind speed in February:
6.9mph - Average wind speed in March:
8mph - Average wind speed in April:
8.4mph - Average wind speed in May:
7.3mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.6mph - Average wind speed in October:
6.6mph - Average wind speed in November:
6.7mph - Average wind speed in December:
5.8mph
The windiest month (with the highest average wind speed) is April (8.4mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).
Average humidity
Pasco, WA
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (35%).
Average rainfall
Pasco, WA
- Average rainfall in January:
0.94" - Average rainfall in February:
0.87" - Average rainfall in March:
0.91" - Average rainfall in April:
0.51" - Average rainfall in May:
0.67" - Average rainfall in June:
0.51"
- Average rainfall in July:
0.2" - Average rainfall in August:
0.24" - Average rainfall in September:
0.28" - Average rainfall in October:
0.71" - Average rainfall in November:
0.63" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is January (0.94").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days
Pasco, WA
- Average rainfall days in January:
11.4 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
10 days - Average rainfall days in May:
8.3 days - Average rainfall days in June:
6.7 days
- Average rainfall days in July:
3.8 days - Average rainfall days in August:
3.5 days - Average rainfall days in September:
4.7 days - Average rainfall days in October:
10 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
10.8 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (3.5 days).
Average snowfall
Pasco, WA
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Pasco, WA
- Average snowfall days in January:
2.3 days - Average snowfall days in February:
3.3 days - Average snowfall days in March:
1.1 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:
1.1 days - Average snowfall days in December:
3.2 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Pasco, WA
- Average daylight in January:
9h and 6min - 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:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 24min - 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 24min - Average daylight in December:
8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
5h and 42min - Average sunshine in March:
7h and 36min - Average sunshine in April:
10h and 12min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 42min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days
Pasco, WA
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
16.1 days - Average sunshine days in April:
17.5 days - Average sunshine days in May:
20.7 days - Average sunshine days in June:
21.6 days
- Average sunshine days in July:
25.3 days - Average sunshine days in August:
24.9 days - Average sunshine days in September:
23.5 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
16.6 days - Average sunshine days in December:
17.2 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14.7 days).
Average UV index
Pasco, WA
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Pasco, WA
The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility
Pasco, WA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
