Once again, we are ending the work week with quite a bit of rain. The good news is that things will improve over the next 24 hours, leading us to a nice second half of the weekend and a good forecast for Patriots Day.

A quick check at the satellite photograph from Friday morning shows a well-formed storm system pushing through New England. The upper level part of this storm will move through the region Saturday bringing some clouds and the chance for a pop-up shower along with gusty winds and temperatures in the 50s. It will feel like a quintessential April day.

A satellite image of clouds moving over the northeastern US.
A strong weather system pushed through New England Friday.
COD Weather

Sunday is my pick of the weekend with plenty of sunshine, although clouds may start to infiltrate the area later in the afternoon ahead of the next fast-moving area of showers. Sunday will reach 60 or a little higher in the afternoon.

A map of expected temperatures across the northeastern United states on Sunday, April 14, 2024. It shows highs in the high 50s and low 60s in Massachusetts.
Sunday early afternoon temperatures will reach the lower 60s across southern New England.
COD Weather

On Sunday night, a weak weather system zips across the region. This will bring clouds and the chance for a couple of light showers. This system is moving fast enough that it should clear the region before sunrise Monday. There may be some wet roads at sunrise for those areas which do end up with a shower, but this will quickly dry.

A map of the northeastern United States, showing a weather system in green moving across New England bringing a few inches of rain.
A small batch of showers crosses the area Sunday night and exits the area by Monday.

Monday brings a blend of clouds and sunshine. Temperatures will start near 50 at sunrise and end up in the lower 60s by late morning and early afternoon. For marathoners, this is going to be a bit warm. There will not be any significant humidity, and actually the air is going to be quite dry.

A map of the Boston area's Monday forecast showing temperatures of about 50 degrees in Hopkinton at 7 a.m., 54 in Ashland at 9 a.m., 56 in Framingham at 10 a.m., 58 in Newton at 11 a.m., 60 degrees in Brighton at noon, and 62 in the Back Bay at 1 p.m.
Patriots Day will be dry and seasonably mild with no chance of rain, but some passing clouds.
Dave Epstein

The dry air will enable folks who are participating in the race to have their sweat mechanisms effectively used because the dry air evaporates the moisture and cools the runner. Those mechanisms are less effective in high humidity.

A chart showing temperatures, winds, and relative humidity on Monday, April 15, 2024.
Monday features a light west wind, partly to mostly sunny skies and mild air.
Dave Epstein NOAA data

There will be a bit of a tailwind as well, but it will be relatively light. Nevertheless, it should help runners rather than hinder them.

For spectators, the weather will be ideal. It will be comfortably mild and there's no chance of any rain. One thing to remember is that the sun this time of the year is as strong as it would be in the last week of August. This means you can easily get burned standing outside watching the runners go by, and sunscreen is definitely a must.

Patriots Day also means there's a morning Red Sox game, and you really couldn't ask for better baseball weather. The nice conditions continue into Tuesday before the next weather system arrives in the middle of next week with a few showers. It will continue to be seasonably mild. Have a great weekend!