Maryland Climate and Weather

For the month of October 2025, the total precipitation that had fallen at Baltimore-Washington International Airport (BWI) through the 29th was 0.72″, which would have ranked as the 12th driest October (tying the amount from 1912) in Baltimore’s official records dating back to 1871. However, late on the 29th, a low pressure system began approaching the area from the southwest, bringing heavy rain to the Mid-Atlantic States. On the 29th, light, measurable rain began falling at BWI by 8:45 PM,…

Read More Read More

UPDATE: Measurable rain amounting to 0.22” fell on November 10, 2024, ending Baltimore’s longest streak without measurable precipitation at 38 days, covering the period October 3rd-November 9th. PREVIOUS POST: At the end of the day on November 4, 2024, the official Baltimore weather station at Baltimore-Washington International Thurgood Marshall Airport (BWI) set the all-time record for days with no measurable precipitation. The period October 3rd-November 4th marks 33-consecutive days reporting <0.01”, superseding the previous record of 32 days covering the…

Read More Read More

Baltimore’s Daily Precipitation record was broken on July 9, 2022 when 1.36” was recorded, superseding the previous record of 0.99” in 1970. Though these amounts are not unusual for July, what is unusual is that this was the last of the meteorological summer months of June, July, and August to not have a calendar day exceeding 1.00” of rain. Other months having each day with extremes of >1.00”: January,  March, September, and December). Baltimore’s official precipitation archive goes back to…

Read More Read More