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Boston Weather: 41.0°F | Partly Cloudy

Weather

Will a New Month Bring a New Weather Pattern?

By Cegeon J. Chan
STAFF METEOROLOGIST

Particularly on summer days, everyone notices the humidity, but how do meteorologists quantify the air’s stickiness? By definition, the dew point is the temperature at which the air must be cooled before it saturates. The lower the number, the drier the air and thus, it can be used as a barometer to judge how “uncomfortable” the air is. If you were sweating at those 4th of July BBQs or on Memorial Drive waiting for the fireworks, blame it on the humidity. Dew points were near 70 degrees Fahrenheit, which is generally considered near the “oppressive” range.

Yesterday’s dew point was at or slightly below 60 F and is usually considered “comfortable” for the summer. For an extreme reference, in the Middle East, where the world’s highest dew points are observed, it is not uncommon for dew points to be near 90 F. In Dubai along the Persian Gulf, fog can form even when temperatures approach 110 F! The next time you think it’s humid here, just remember, it could be worse.

With dew points near 60 F and sunny skies, expect today to be similar to yesterday’s “Top 10 days” of the summer. In fact, the next 7-10 days, average dew points will be in the lower 60s and free of widespread rainfall. July is shaping up to be a month that will (hopefully) make people forget the past two soggy months. Enjoy the weather, we’ve earned it!

Extended Forecast

Today: Mostly sunny. Highs in the lower 80s F (27 C).

Tonight: Mostly clear. Lows in the lower 60s F (17 C).

Tomorrow: Mostly sunny. Highs in the lower 80s F (27 C).

Tomorrow Night: Mostly clear. Cooler. Lows in the lower 60s F (17 C).

Sunday: Mostly sunny. Highs in the mid 80s F (29 C).