Climate and monthly weather forecastFederal Way, WA
Climate and monthly weather forecast
The climate of Federal Way
Situated in Washington, USA, Federal Way boasts a climate classified as Mediterranean, warm summer (Csb) according to the Köppen climate classification. This categorization derives from its long, dry summers and moderate, wet winters. A deep dive into the numerical climatic data reveals more details about Federal Way's unique climate throughout the year.An observant reader of Federal Way's annual weather parameters will see modest temperature fluctuations. High temperatures rise from a comfortable 44.4°F (6.9°C) in January to a peak of 77.5°F (25.3°C) by August, while lows hover between a chilly 34.2°F (1.2°C) in December to a warm 52.9°F (11.6°C) in the same peak month of August. The humidity keeps within a narrow band as well, showing minor variation from 68% to 86% throughout the year. Interestingly, the wind speed retains a similarly steadied sway, with an annual fluctuation between 3.5mph (5.6km/h) to 5.1mph (8.2km/h) only.
Federal Way experiences its maximum rainfall of 4.72" (120mm) in December, while the driest month, July, sees an insignificant 0.43" (11mm). A remarkable characteristic of the locations climate is the snowfall, which primarily occurs only in the first and last quarter of the year, with February witnessing the highest snowfall of 3.27" (83mm). The daylight hours show a marked difference between winter and summer, with the city basking under the sun for an extravagant 15.9 hours in June, contrasting sharply with the shortest daylight spell of 8.6 hours that December brings.
The best time to visit Federal Way
Taking into consideration the temperature, humidity, rainfall, and daylight hours, July and August prove to be the most favorable months for visiting Federal Way. The temperatures climb to a comfortable range between 76.8°F (24.9°C) and 77.5°F (25.3°C), coupled with the relative humidity falling to a comfortable 68% to 69%. The rainfall is also at its minimum during these months, making outdoor activities more enjoyable. Also, with daylight reaching maximum length from 15.5 hours to 14.2 hours, these months offer ample time to explore the city.The worst time to visit Federal Way
On the other hand, the least desirable time to visit Federal Way would be from November through January. These months show the lowest average temperature, dropping to between 42.6°F (5.9°C) and 44.4°F (6.9°C). Additionally, the relatively high rainfall reaching up to 4.72" (120mm) in December accompanied by high relative humidity of 85% to 86%, can make for quite uncomfortable outdoor activities. Moreover, the shortest daylight span of 8.6 hours to 9 hours adds to the unfavorable conditions during this period.Spring weather in Federal Way
Spring in Federal Way, lasting from March to May, experiences a gentle warming trend with high temperatures gradually increasing from 50.5°F (10.3°C) in March to 64.9°F (18.3°C) in May. Lows during this period follow suit, rising from 36.3°F (2.4°C) to 43.7°F (6.5°C). Rainfall tends to decrease progressively from 3.27" (83mm) in March to 1.65" (42mm) in May. There is minimal to no snowfall during these months contributing to making spring a pleasant time in Federal Way.Summer weather in Federal Way
Widely regarded as the best season, Summer in Federal Way, from June to August, is mild and dry. High temperatures fluctuate modestly between 69.4°F (20.8°C) and 77.5°F (25.3°C) and the lows remaining between 46.9°F (8.3°C) and 52.9°F (11.6°C). The city experiences minimal rainfall from 0.43" (11mm) in July to 0.63" (16mm) in August. With daylight reaching its peak and humidity at its lowest, summer provides the most enjoyable climate.Autumn weather in Federal Way
In Federal Way, autumn sets in around September and lasts until November. The weather begins to cool, and rainfall increases, giving the city a fresh appeal. High temperatures decrease from 70°F (21.1°C) in September to 48.4°F (9.1°C) by November. While the lows move down from 49.1°F (9.5°C) to 38.7°F (3.7°C). Rainfall begins to increase significantly from 1.61" (41mm) in September to 3.78" (96mm) by November.Winter weather in Federal Way
The winter months in Federal Way, from December to February, see the coldest temperatures and the highest rainfall. High temperatures range from 42.6°F (5.9°C) in December to 46°F (7.8°C) in February, with the lows ranging between 34.2°F (1.2°C) and 35.1°F (1.7°C). The city receives its highest rainfall of 4.72" (120mm) in December, and snowfall returns reaching its peak of 3.27" (83mm) in February, contributing to the city's beautiful wintry landscape.Weather in January
The opening chapter of the yearly climatological narrative in Federal Way, Washington ascribes to the heart of winter living out its frosty tales. January conveys the demeanor of a quintessential winter month draped in cool breezes and frequent rainfall. Weather in January »Weather in February
Perpetuating the chilly saga from January, February sustains the embrace of wintry conditions. A marginal hike in the temperature extends an inkling of Spring, though remaining at bay under the winter's supremacy. Snow adorns the cityscapes sparingly with an average snowfall of 3.27" (83mm), making February the month with the highest snowfall. Weather in February »Weather in March
March ushers in the early spring, shedding off the winter layers while treading cautiously towards milder climes. Rainfall is frequent, though less voluminous as compared to preceding months. To underline, the average rainfall stands at 3.27" (83mm), distributed over 20 days. Weather in March »Weather in April
With the arrival of April, Federal Way experiences a palpable transition to a friendlier climate regime. The city witnesses a longer play of daylight stretching about 13.7 hours, paving the way for more sunlit hours. The average maximum wind speed subsides further to around 5.1mph (8.2km/h), signaling the calmness of the spring air. Weather in April »Weather in May
Graciously embracing the heart of spring, May elucidates a warm and lively symphony of weather elements in Federal Way, Washington. The city observes a commanding plunge in average rainfall to merely 1.65" (42mm), embracing the drier air of mid-year. Weather in May »Weather in June
June seals the spring and gently unwraps the onset of pleasant early summer conditions. Federal Way sees a marked uptick in average high temperatures, inviting a warm air that lightens up the mood of city dwellers. A noteworthy element of June's weather is the lower number of average rainfall days, dwindling to a year-low of just 7. Weather in June »Weather in July
Following the gentle prequel of June, July bursts into a robust summer display, making it the warmest month in Federal Way. With sweltering average highs nearing 76.8°F (24.9°C), July owns the climax of summer. rainfall transitions to a mere drizzle with less than half an inch of precipitation falling throughout the month. Weather in July »Weather in August
The curtain of August descends keeping up with the warm template of summer set in July. Warm breezes mingle around Federal Way, preserving the heartiness of the Summer season. August carries the flame of cloudless skies with the least cloud cover of 25% throughout the month providing ample sunshine. Weather in August »Weather in September
Marking the transition from glowing summer to mellow fall, the city adorns itself under the September sky. September sees a dip in average highs to around 70°F (21.1°C), hinting at the incoming autumn chill. The rainfall attends daily routines more frequently, with a noticeable rise in intensity. Weather in September »Weather in October
October sways to the rhythms of fall, intruding on the warmth with a steady drop in temperatures. The weather elements appear more active than September, infusing cooler threads into the federal way's canvas. Above all, rainfall becomes voluminous again, amounting to an average of about 3.43" (87mm). Weather in October »Weather in November
Living out the last tales of Fall, November experiences a stark transition to colder conditions. The dip in temperatures and escalating rainfall threads together the late autumn narrative. A relatively high relative humidity of 85% corroborates the rise in moisture levels and cooler temperature. Weather in November »Weather in December
Taking cues from November, December indulges in the frigid tenderness of winter, closing the annual climatic cycle in Federal Way. This month sees an uptick in rainfall, with the maximum volume of 4.72" (120mm), marking the wettest time of the year. Weather in December »Updated: Jun 30, 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 86%, are most humid months.
In Federal Way, during the entire year, the rain falls for 177.2 days and collects up to 30.79" (782mm) of precipitation.
January through April, November and December are months with snowfall.
In Federal Way, Washington, during the entire year, snow falls for 13.3 days and aggregates up to 7.01" (178mm) of snow.
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 4.4 days and accumulates 3.27" (83mm) 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 Federal Way, Washington, snow does not fall in May through October.
June has the longest days of the year in Federal Way, with an average of 15h and 54min of daylight.
The least humid month is July, with an average relative humidity of 68%.
July is the month with the least rainfall. Rain falls for 7 days and accumulates 0.43" (11mm) of precipitation.
July is the month with the highest UV index, with an average maximum UV index of 6.
With average high temperatures of 77.5°F (25.3°C) and lows of 52.9°F (11.6°C), August is the warmest month.
The month with the most sunshine is August, with an average of 10.9h of sunshine.
December is the month when Federal Way experiences its coldest temperatures, averaging a high of 42.6°F (5.9°C) and a low of 34.2°F (1.2°C).
December is the month with the most rainfall. Rain falls for 18.2 days and accumulates 4.72" (120mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 30min of daylight.
The month with the least sunshine is December, with an average of 4.2h of sunshine.
Average temperature
Federal Way, WA
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure
Federal Way, WA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.05"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:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.04"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 March, August and September (30.01"Hg).
Average wind speed
Federal Way, WA
- Average wind speed in January:
4.9mph - Average wind speed in February:
4.9mph - Average wind speed in March:
5.1mph - Average wind speed in April:
4.6mph - Average wind speed in May:
4mph - Average wind speed in June:
3.9mph
- Average wind speed in July:
3.5mph - Average wind speed in August:
3.5mph - Average wind speed in September:
3.8mph - Average wind speed in October:
4.2mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.5mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity
Federal Way, WA
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is July (68%).
Average rainfall
Federal Way, WA
- Average rainfall in January:
4.53" - Average rainfall in February:
2.99" - Average rainfall in March:
3.27" - Average rainfall in April:
2.48" - Average rainfall in May:
1.65" - Average rainfall in June:
1.26"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.63" - Average rainfall in September:
1.61" - Average rainfall in October:
3.43" - Average rainfall in November:
3.78" - Average rainfall in December:
4.72"
The wettest month (with the highest rainfall) is December (4.72").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days
Federal Way, WA
- Average rainfall days in January:
17.8 days - Average rainfall days in February:
16.1 days - Average rainfall days in March:
20 days - Average rainfall days in April:
17.9 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
12.4 days
- Average rainfall days in July:
7 days - Average rainfall days in August:
5.9 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
15.5 days - Average rainfall days in November:
19.6 days - Average rainfall days in December:
18.2 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (5.9 days).
Average snowfall
Federal Way, WA
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Federal Way, WA
- Average snowfall days in January:
2.5 days - Average snowfall days in February:
4.4 days - Average snowfall days in March:
2.4 days - Average snowfall days in April:
0.8 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:
2.1 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Federal Way, WA
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 18min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 6min - Average daylight in June:
15h and 54min
- Average daylight in July:
15h and 30min - Average daylight in August:
14h and 12min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 18min - Average daylight in December:
8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 12min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 36min - Average sunshine in November:
4h and 36min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days
Federal Way, WA
- Average sunshine days in January:
11 days - Average sunshine days in February:
8.5 days - Average sunshine days in March:
9.4 days - Average sunshine days in April:
10 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
15 days
- Average sunshine days in July:
21.8 days - Average sunshine days in August:
22.8 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
13.9 days - Average sunshine days in November:
8.5 days - Average sunshine days in December:
10.4 days
The month with the most sunshine days is August (22.8 days).
The months with the least sunshine days are February and November (8.5 days).
Average UV index
Federal Way, WA
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
Federal Way, WA
The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
Federal Way, WA
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (5mi).
