The hottest month in Maryland is July when the average maximum temperature is 30°, average temperature is 25° and average minimum temperature is 21°.
The coolest month in Maryland is January when the average maximum temperature is 7°, average temperature is 3° and average minimum temperature is -2°.
The longest days in Maryland are in June, with an average of 14.8 hours of daylight per day. December has the shortest days with an average of 9.5 hours of daylight per day.
The sunniest days in Maryland are in July which has the most hours of sunshine per day with an average of 9.6 hours of sunshine per day, making it a sunny month with few clouds. December has the least sunshine with an average of 7.3 hours of sunshine per day, making it a quite sunny month with some cloud cover.
The ultraviolet index is the highest in July when it reaches 10.2 and lowest in December when it reaches 1.9.
An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Maryland are found in August when they peak at 23° and lowest in March when they dip to 3°.
The sea is best for swimming between June and December when the temperature is above 13° which is cold for swimming, a full wet suit is required to spend any length of time in the sea.
The wettest month in Maryland is December with 93.7cm of rain and October has the most days of rain with 12.6 days with some rain, a wet time to visit the beach.
The driest month in Maryland is February with 54.1cm of rain and July has the fewest days of rain with 10.3 days with some rain, a slightly wet time to visit the beach.
The most humid month in Maryland is July with a dew point (an indicator of humidity) of 23° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
The least humid month in Maryland is February with a dew point of 1° which is a bit dry for some.
The most windy month in Maryland is February when the average maximum windspeed is 26kmh and the average wind speed is 13kmh.
The least windy month in Maryland is August when the average maximum windspeed is 19kmh and the average wind speed is 9kmh.