United StatesAverage weather for Half Moon Bay in May
It's cool to moderate in May in Half Moon Bay with an average temperature of 16°C. Temperatures this month range from a low of 15°C to a high of 18°C. At night, you can expect temperatures between 9°C and 12°C.
Start of May
The month of May starts in Half Moon Bay with cool temps, averaging around 16°C during the day and nights around 11°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid May
By mid-May, daytime temps rise to around 17°C, with nights around 12°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of May
By the end of May, the average daytime temperature in Half Moon Bay is around 17°C, while nighttime temps are about 12°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
In May, there is an average of 11 mm of precipitation, spread over 2 days. The wind speed is around 4 Bft, mostly coming from the West.
Half Moon Bay in May |
New York | ||
|---|---|---|---|
 Average temperature |
16°C | 22°C | |
 Max. temperature |
18°C | 28°C | |
| Min. temperature |
15°C | -5°C | |
 Total precipitation |
11 mm | 105 mm | |
| Rainy days |
2 days | 14 days | |
April
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Half Moon Bay?
Looking for sun and warm weather? May isn’t a good month to be in Half Moon Bay. The temperatures are too low for a warm stay this month.
Temperature records
With 33°C in 2014, Half Moon Bay reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 12°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 4°C to a highest value of 15°C.
Check out the climate of Half Moon Bay for all months and discover the best travel time
Daily Temperature in May in Half Moon Bay
This chart shows the average daily high and low temperatures in May for Half Moon Bay, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Half Moon Bay
The chart below shows the average daily precipitation in May for Half Moon Bay, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 2 days of precipitation in Half Moon Bay.
Daily UV index in May in Half Moon Bay
This chart shows the average daily UV index in May in Half Moon Bay, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Half Moon Bay over the years
This chart shows the average temperature in May in Half Moon Bay, measured in degrees Celsius, over the past few years.
Total precipitation in May in Half Moon Bay over the years
This chart shows the average precipitation in May in Half Moon Bay, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Half Moon Bay
Click on any day in May to get detailed info about the usual weather on that day in Half Moon Bay. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Half Moon Bay
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Average weather in Half Moon Bay by month
Click on a month below to see detailed weather info for Half Moon Bay. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Half Moon Bay for all months at once
