Temperatures in May
It's warm in May in Potomac with an average temperature of 23°C. Temperatures this month range from a low of 18°C to a high of 28°C. At night, you can expect temperatures between 9°C and 18°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Potomac in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Potomac with mild temperatures, averaging around 21°C during the day and nights close to 12°C. Plenty of days with a chance of precipitation.
Mid-May
By mid-May, the average daytime temperature rises to around 23°C, with nights close to 13°C. The chance of precipitation is high during this period.
End of May
By the end of May, the average daytime temperature in Potomac will be around 27°C, with nights close to 17°C. There’s a significant chance of many days with precipitation.
As it gets cooler in the evening, it’s best to wear layers.
Discover cheap trips to Potomac 
Precipitation in May
In May, there is an average of 264 mm of precipitation, spread over 12 days. The wind speed is around 3 Bft, mostly coming from the South.
The average precipitation chance is 39% per day this month. The weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Potomac. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Potomac in May |
London | ||
|---|---|---|---|
 Average Temperature |
23°C | 18°C | |
 High Temp |
28°C | 21°C | |
| Low Temp |
18°C | 15°C | |
 Total Precipitation |
264 mm | 46 mm | |
| Rainy Days |
12 days | 8 days | |
April
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 Potomac?
After some sun? Then May isn’t the best time to be in Potomac. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Potomac in May
With 35°C, Potomac hit the highest temperature in the last 10 years in May 2022. The lowest daytime temperature in this month was 8°C in 2020. The extreme night temperatures ranged from a low of 0°C to a high of 24°C.
Check out the climate of Potomac for all months and discover the best travel time
Plan your next holiday
Don’t miss the best holiday deals for Potomac and see what our partners have for you.
Daily Temperature in May in Potomac
This chart shows the average daily temperatures, both day and night, for each day in May in Potomac, 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 Potomac
The chart below shows the average daily precipitation in May for Potomac, 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 12 days of rain in Potomac.
Daily UV Index in May in Potomac
This chart shows the average daily UV index in May in Potomac, 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 Potomac Over the Years
This chart shows the average temperature in May in Potomac, measured in degrees Celsius, over the past years.
Total Precipitation in May in Potomac Over the Years
This chart shows the average precipitation in May in Potomac, 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 Potomac
Click on a specific day in May for detailed info on the typical weather on that day in Potomac. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Potomac
Have you been to Potomac in May?
Share your weather experience in May in Potomac.
Average Weather in Potomac by Month
Click on a month below to see detailed weather info for Potomac. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
