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May weather forecast in Half Moon Bay

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

27 April, sun

	754 mmHg		80%
	6.8 m/s		+13

27 April, Sunday. day, 14°; night, 10°; clear

28 April, mon

	754 mmHg		80%
	6.6 m/s		+13

28 April, Monday. day, 14°; night, 10°; clear

29 April, tue

	754 mmHg		79%
	6.7 m/s		+13

29 April, Tuesday. day, 14°; night, 10°; clear

30 April, wed

	754 mmHg		79%
	6.8 m/s		+13

30 April, Wednesday. day, 15°; night, 10°; clear

1 May, thu

	753 mmHg		78%
	6.9 m/s		+13

1 May, Thursday. day, 15°; night, 11°; clear

2 May, fri

	753 mmHg		80%
	6.5 m/s		+13

2 May, Friday. day, 15°; night, 11°; rain

3 May, sat

	753 mmHg		81%
	5.9 m/s		+13

3 May, Saturday. day, 15°; night, 11°; partly cloudy

4 May, sun

	753 mmHg		82%
	5.9 m/s		+13

4 May, Sunday. day, 15°; night, 10°; partly cloudy

5 May, mon

	753 mmHg		82%
	6.3 m/s		+13

5 May, Monday. day, 14°; night, 10°; partly cloudy

6 May, tue

	753 mmHg		80%
	6.5 m/s		+13

6 May, Tuesday. day, 14°; night, 11°; partly cloudy

7 May, wed

	753 mmHg		80%
	6.6 m/s		+13

7 May, Wednesday. day, 15°; night, 11°; clear

8 May, thu

	753 mmHg		81%
	6.2 m/s		+13

8 May, Thursday. day, 15°; night, 11°; clear

9 May, fri

	753 mmHg		81%
	6.5 m/s		+12

9 May, Friday. day, 14°; night, 10°; clear

10 May, sat

	753 mmHg		81%
	6.7 m/s		+13

10 May, Saturday. day, 14°; night, 10°; clear

11 May, sun

	754 mmHg		81%
	6.6 m/s		+13

11 May, Sunday. day, 14°; night, 10°; clear

12 May, mon

	753 mmHg		81%
	6.3 m/s		+13

12 May, Monday. day, 14°; night, 10°; partly cloudy

13 May, tue

	753 mmHg		82%
	6.3 m/s		+13

13 May, Tuesday. day, 14°; night, 10°; partly cloudy

14 May, wed

	753 mmHg		83%
	6.1 m/s		+13

14 May, Wednesday. day, 15°; night, 11°; partly cloudy

15 May, thu

	753 mmHg		83%
	6.3 m/s		+14

15 May, Thursday. day, 15°; night, 11°; rain

16 May, fri

	753 mmHg		83%
	6.7 m/s		+14

16 May, Friday. day, 15°; night, 11°; overcast

17 May, sat

	753 mmHg		82%
	6.6 m/s		+13

17 May, Saturday. day, 15°; night, 11°; partly cloudy

18 May, sun

	753 mmHg		83%
	6.6 m/s		+13

18 May, Sunday. day, 15°; night, 11°; rain

19 May, mon

	753 mmHg		82%
	6.7 m/s		+13

19 May, Monday. day, 15°; night, 11°; clear

20 May, tue

	753 mmHg		81%
	6.8 m/s		+13

20 May, Tuesday. day, 15°; night, 11°; clear

21 May, wed

	753 mmHg		82%
	6.8 m/s		+13

21 May, Wednesday. day, 15°; night, 11°; clear

22 May, thu

	752 mmHg		81%
	6.9 m/s		+13

22 May, Thursday. day, 15°; night, 11°; clear

23 May, fri

	752 mmHg		81%
	6.7 m/s		+13

23 May, Friday. day, 15°; night, 11°; clear

24 May, sat

	752 mmHg		83%
	6.2 m/s		+12

24 May, Saturday. day, 15°; night, 11°; partly cloudy

25 May, sun

	752 mmHg		83%
	6 m/s		+13

25 May, Sunday. day, 15°; night, 11°; partly cloudy

26 May, mon

	752 mmHg		84%
	6 m/s		+13

26 May, Monday. day, 15°; night, 11°; overcast

27 May, tue

	753 mmHg		84%
	6 m/s		+13

27 May, Tuesday. day, 14°; night, 11°; overcast

28 May, wed

	753 mmHg		84%
	6.2 m/s		+13

28 May, Wednesday. day, 15°; night, 11°; overcast

29 May, thu

	753 mmHg		84%
	6.5 m/s		+13

29 May, Thursday. day, 15°; night, 11°; partly cloudy

30 May, fri

	753 mmHg		83%
	6.2 m/s		+13

30 May, Friday. day, 15°; night, 11°; clear

31 May, sat

	752 mmHg		83%
	5.8 m/s		+13

31 May, Saturday. day, 15°; night, 11°; partly cloudy

Average data for 10 years

Half Moon Bay May

12

sunny days

3

days with precipitation

5

cloudy days

12 sunny days; 3 days with precipitation; 5 cloudy days;

82

%

air humidity

4.4

m/s

WindW

21

mm of precipitation

(4% of annual average)

+13

°C

Water temperature

air humidity 82%; 21 millimeters of precipitation (4% of annual average); Wind westerly 4.4 Meters per second; Water temperature +13°

Weather graphs for May

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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W

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W

W

W

W

W

W

W

W

W

W

W

W

W

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W

W

W

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W

W

W

1

Average data for 10 years

2

3

4

5

6

7

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9

10

11

12

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15

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18

19

20

21

22

23

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29

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31

Daytime temperature

Night-time temperature

Cities near you

San Francisco
Sacramento
San Jose
Washington
Oakland
Monterey
Palo Alto
Fremont
Santa Cruz

Cities with similar weather in May

Stockholm
Copenhagen
Melbourne
Wellington
Gdansk
Looe
Klaipeda
Bruges
Parnu

The weather forecast for May 2025 is based on historical data from the past 10 years.

In May, the weather in Half Moon Bay is typically warm. Average daily high temperature in May is about 15 degrees above zero. On average, Half Moon Bay has 12 sunny, 12 partly cloudy, 4 cloudy, and 3 rainy days in May. The rains are usually light.

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