High humidity and the threat of heavy rain returns! - WFSB 3 Connecticut

Technical Discussion

High humidity and the threat of heavy rain returns!

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JULY 2018…

The month of July is over!  The average temperature at Bradley International Airport came in at 76.1 degrees, which is 2.5 degrees warmer than normal.  That means this July is the 8th warmest on record for the Greater Hartford Area, and records date back to 1905.  That is quite impressive!  We had 11 days that were 90 degrees or higher.  The hottest day was July 1st when the high temperature was 98 degrees at Bradley.  Temperatures were in the 90s the first 5 days of July, concluding a heat wave (which began in late June) that lasted a total of 7 days.

The first half of July was dry, but the second half was quite wet.  Total rainfall for the month was 6.39”, which is 2.21” above normal.


Today is the first day of August, but it is not going to be a pleasant start to the month.  A warm front will move northward through Southern New England and the humidity will rise to uncomfortable levels.  Dew point temperatures will rise to into the low and middle 70s, which is oppressive humidity.  While there are a few showers in the state this morning,  scattered showers and storms are more likely during the afternoon and evening.  Since the atmosphere will be loaded with moisture, showers and storms will be capable of producing torrential downpours and perhaps some very localized flooding.  Also, there is the potential for isolated severe storms this afternoon and evening.  It appears to be a low risk at this time, but gusty winds and perhaps even an isolated tornado can’t be completely ruled out somewhere in Southern New England.

Overall, today will be a mostly cloudy day.  High temperatures will greatly depend on any developing sunshine, but for now we believe highs will be in the low and middle 80s.  Of course, it will feel warmer than that due to the high humidity.  The heat index could approach 90 degrees.


High pressure in the Western Atlantic will continue to pump tropical air into Southern New England.  Both Thursday and Friday will be partly sunny, hot and humid.  Highs will be in the 80s to near 90 degrees.  There will also be a chance for a shower or thunderstorm each day, primarily in the afternoon and evening hours.  While our weather will be dry most of the time, some storms will produce torrential rain and there may be a risk for some very localized flash flooding, especially if the storms train (one downpour after another) over parts of the state.


A front will move into the humid air on Saturday.  That means there will be a good chance for more showers and a few thunderstorms.   With an abundance of cloud cover, temperatures will probably stay in the 80s for highs.

Sunday should be a brighter, quieter day.  However, it will be hot!  We are forecasting mostly sunny skies and highs 90-95.  The humidity may drop off a little.  The risk of a shower or thunderstorm is low.


The hot weather will continue Monday and Tuesday and the humidity will be higher again.  Both days should be partly sunny with highs in the low and middle 90s away from the coast.  There may be a slight chance for a thunderstorm on Monday and perhaps a better chance for a storm Tuesday afternoon/evening.

Chief Meteorologist Bruce DePrest with Scot Haney

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