May weather forecast
Tacoma, WA

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The city of Tacoma, Washington lit perfectly in the night
The city of Tacoma, Washington lit perfectly in the night

Weather in May

May ushers in a desirable tempest of balmy weather as Tacoma, Washington fully embraces spring. With the mercury hitting a high of 65.8°F (18.8°C), the city sheds away any lingering signs of the past winter. The drastically reduced rainfall to 1.57" (40mm) and longer sunshine durations mark a transformation of sorts. The city begins to buzz with events, parades, and festivals celebrating the arrival of clear skies and delightful temperatures. The change in climate paves the way for more outdoor activities and a vibrant, spirited Tacoma awaits its residents.

Temperature

As Tacoma transitions into May, a marginal rise in the average high-temperature is observed, moving from a mild 57.2°F (14°C) in April to a still refreshing 65.8°F (18.8°C). Tacoma sees a consistent average low-temperature of 43.5°F (6.4°C) in May, indicating a substantial decrease from the day's temperature.

Humidity

In May, the average relative humidity is 74%.

Rainfall

In Tacoma, Washington, in May, it is raining for 13.3 days, with typically 1.57" (40mm) of accumulated precipitation. In Tacoma, Washington, during the entire year, the rain falls for 172.9 days and collects up to 30.08" (764mm) of precipitation.

Snowfall

April through October are months without snowfall in Tacoma.

Ocean temperature

In Tacoma, the average seawater temperature in May is 46.8°F (8.2°C).
Note: Dipping into 46.8°F (8.2°C) below 50°F (10°C) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 55.4°F (13°C) feels cold to the bone.

Daylight

In May, the average length of the day in Tacoma is 15h and 7min.
On the first day of May in Tacoma, Washington, sunrise is at 5:51 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:57 pm PDT.

Sunshine

The average sunshine in May in Tacoma, Washington, is 8.8h.

UV index

The average daily maximum UV index in May in Tacoma is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The UV index of 4 during May translates into the following guidance:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
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Frequently asked questions

What is the temperature in May in Tacoma?

The average high-temperature, in May, in Tacoma, is 65.8°F (18.8°C), while the average low-temperature is 43.5°F (6.4°C).

What is the average humidity in May in Tacoma?

In May, the average relative humidity in Tacoma is 74%.

How many days does it rain in May in Tacoma?

In Tacoma, in May, it is raining for 13.3 days, with typically 1.57" (40mm) of accumulated precipitation.

When it does not snow in Tacoma?

April through October are months without snowfall in Tacoma, Washington.

What is the ocean temperature in May in Tacoma?

In Tacoma, Washington, the average seawater temperature in May is 46.8°F (8.2°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Tacoma have in May?

In May, the average day length is 15h and 7min.

When is the sunrise / sunset in May in Tacoma?

On the first day of May, sunrise is at 5:51 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:57 pm PDT.

How long on average sun shines in May in Tacoma?

In Tacoma, the average sunshine duration in May is 8.8h.

What is the UV index reading in May in Tacoma?

The average daily maximum UV index in May in Tacoma is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMayJJASOND
Apr
May
Jun
Average high temperature
57.2°F 14°C
65.8°F 18.8°C
70.3°F 21.3°C
Average low temperature
39.4°F 4.1°C
43.5°F 6.4°C
47.1°F 8.4°C
Average pressure
30.05" 763mmHg
30.03" 763mmHg
30.03" 763mmHg
Average wind speed
4.8mph 7.7km/h
4.3mph 6.9km/h
4.2mph 6.8km/h
Average max. wind speed
5.3mph 8.5km/h
4.8mph 7.7km/h
4.7mph 7.6km/h
Average wind speed gusts
7.5mph 12.1km/h
6.4mph 10.3km/h
6.2mph 10km/h
Average humidity
79%
74%
73%
Average rainfall
2.44" 62mm
1.57" 40mm
1.14" 29mm
Average rainfall days
17.9
13.3
11.4
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0.2
0
0
Average sea temperature
45.9°F 7.7°C
46.8°F 8.2°C
47.9°F 8.8°C
Average daylight
13h 4min
15h 1min
15h 5min
Average sunshine
7h 5min
8h 5min
9h 2min
Average sunshine days
9.9
15.5
16
Average UV index
3
4
5
Average cloud cover
52%
45%
44%
Average visibility
5mi 8km
5mi 8km
6mi 9.7km

Average temperature in May
Tacoma, WA

Average temperature in May - Tacoma, WA
  • Average high temperature in May: 65.8°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in May: 43.5°F

The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).

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Average pressure in May
Tacoma, WA

Average pressure in May - Tacoma, WA
  • Average pressure in May: 30.03"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

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Average wind speed in May
Tacoma, WA

Average wind speed in May - Tacoma, WA
  • Average wind speed in May: 4.3mph

The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in May
Tacoma, WA

Average humidity in May - Tacoma, WA
  • Average humidity in May: 74%

The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (68%).

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Average rainfall in May
Tacoma, WA

Average rainfall in May - Tacoma, WA
  • Average rainfall in May: 1.57"

The wettest month (with the highest rainfall) is December (4.69").
The driest month (with the least rainfall) is July (0.39").

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Average rainfall days in May
Tacoma, WA

Average rainfall days in May - Tacoma, WA
  • Average rainfall days in May: 13.3 days

The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (5 days).

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Average snowfall in May
Tacoma, WA

Average snowfall in May - Tacoma, WA
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Tacoma, WA

Average snowfall days in May - Tacoma, WA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in May
Tacoma, WA

Average sea temperature in May - Tacoma, WA
  • Average sea temperature in May: 46.8°F

The best month for swimming (with the highest average sea temperature) is August (53.7°F).
The coldest month (with the lowest average sea temperature) is February (45.8°F).

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Average daylight in May /
Average sunshine in May
Tacoma, WA

Average daylight in May / Average sunshine in May - Tacoma, WA
  • Average daylight in May: 15h and 1min

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 36min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).

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Average sunshine days in May
Tacoma, WA

Average sunshine days in May - Tacoma, WA
  • Average sunshine days in May: 15.5 days

The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (9 days).

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Average UV index in May
Tacoma, WA

Average UV index in May - Tacoma, WA
  • Average UV index in May: 4

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).

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Average cloud cover in May
Tacoma, WA

Average cloud cover in May - Tacoma, WA
  • Average cloud cover in May: 45

The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in May
Tacoma, WA

Average visibility in May - Tacoma, WA
  • Average visibility in May: 5mi

The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).

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Tacoma, Washington, USA

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