Normal weather for San Bernardino in May
It's warm in May in San Bernardino with an average temperature of 27°C. Temperatures this month range from a low of 23°C to a high of 30°C. At night, you can expect temperatures between 12°C and 15°C.
According to weather history, there is only 7,9 mm of precipitation in May. The wind speed is around 4 Bft, mostly coming from the West.
San Bernardino in May |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 18°C | |
 High Temp |
30°C | 21°C | |
| Low Temp |
23°C | 15°C | |
 Total Precipitation |
7,9 mm | 46 mm | |
| Rainy Days |
3 days | 8 days | |
Start of May
The month of May starts in San Bernardino with hot temperatures, averaging around 27°C during the day and nights close to 14°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
Mid-May
By mid-May, the average daytime temperature stays the same at 27°C, with nights close to 14°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
Temperatures vary between day and night, so it’s smart to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
End of May
By the end of May, the average daytime temperature in San Bernardino will be around 28°C, with nights close to 14°C. No precipitation expected, with plenty of sunshine on the horizon.
As it gets cooler in the evening, it’s best to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
Discover cheap trips to San Bernardino 
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit San Bernardino?
Want nice weather? Then May is a great time to be in San Bernardino. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for San Bernardino in May
With 38°C, San Bernardino hit the highest temperature in the last 10 years in May 2014. The lowest daytime temperature in this month was 12°C in 2018. The extreme night temperatures ranged from a low of 6°C to a high of 22°C.
Check out the climate of San Bernardino for all months and discover the best travel time
April
Plan your next holiday
Don’t miss the best holiday deals for San Bernardino and see what our partners have for you.
Daily Temperature in May in San Bernardino
This chart shows the average daily temperatures, both day and night, for each day in May in San Bernardino, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in San Bernardino
The chart below shows the average daily precipitation in May for San Bernardino, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 3 days of rain in San Bernardino.
Daily UV Index in May in San Bernardino
This chart shows the average daily UV index in May in San Bernardino, 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 San Bernardino Over the Years
This chart shows the average temperature in May in San Bernardino, measured in degrees Celsius, over the past years.
Total Precipitation in May in San Bernardino Over the Years
This chart shows the average precipitation in May in San Bernardino, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for San Bernardino
Click on a specific day in May for detailed info on the typical weather on that day in San Bernardino. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in San Bernardino
Have you been to San Bernardino in May?
Share your weather experience in May in San Bernardino.
Average Weather in San Bernardino by Month
Click on a month below to see detailed weather info for San Bernardino. 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 San Bernardino for all months at once
