Waltham, MA 02451 Hourly Weather

Middlesex County6:32 AM EDT42.40°N, 71.25°W

Next 48 hours

6 AM 9 AM 12 PM 3 PM 6 PM 9 PM Fri Oct 23 12 AM 3 AM 6 AM 9 AM 12 PM 3 PM 6 PM 9 PM Sat Oct 24 12 AM 3 AM 30° 40° 50° 60° %
TemperatureFeels likeChance of precipitationNight
Thursday, October 2218 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
6 AM Cloudy 42° 36° 2% 0.00 in N 10 G20 79% 36° 95% 0
7 AM Cloudy 42° 36° 1% 0.00 in N 10 G21 76% 35° 90% 0
8 AM Mostly Cloudy 43° 37° 1% 0.00 in N 10 G21 73% 35° 79% 0
9 AM Mostly Cloudy 46° 41° 1% 0.00 in N 12 G23 68% 36° 70% 1
10 AM Partly Sunny 49° 44° 1% 0.00 in N 13 G25 63% 37° 67% 2
11 AM Partly Sunny 52° 52° 0% 0.00 in N 13 G25 56% 37° 67% 3
12 PM Partly Sunny 55° 55° 0% 0.00 in N 13 G25 51% 37° 68% 4
1 PM Mostly Sunny 58° 58° 0% 0.00 in N 13 G24 44% 36° 48% 3
2 PM Mostly Sunny 60° 60° 0% 0.00 in N 13 G23 39% 35° 31% 3
3 PM Mostly Sunny 60° 60° 0% 0.00 in N 12 G22 41% 36° 31% 2
4 PM Sunny 61° 61° 0% 0.00 in N 10 G21 42% 38° 21% 1
5 PM Sunny 59° 59° 0% 0.00 in N 9 G18 47% 39° 15% 0
6 PM Mostly Clear 58° 58° 0% 0.00 in N 10 G20 49% 39° 23% 0
7 PM Mostly Clear 56° 56° 0% 0.00 in N 12 G22 55% 40° 14% 0
8 PM Mostly Clear 53° 53° 0% 0.00 in N 14 G23 64% 41° 22% 0
9 PM Mostly Clear 52° 52° 0% 0.00 in N 13 G22 61% 39° 11% 0
10 PM Mostly Clear 50° 46° 0% 0.00 in N 12 G21 63% 38° 16% 0
11 PM Clear 49° 44° 0% 0.00 in N 12 G18 63% 37° 4% 0
Friday, October 2324 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Clear 47° 42° 0% 0.00 in N 12 G18 65% 36° 3% 0
1 AM Clear 46° 41° 0% 0.00 in N 10 G17 65% 35° 2% 0
2 AM Clear 44° 38° 0% 0.00 in N 10 G17 68% 34° 1% 0
3 AM Clear 42° 37° 0% 0.00 in N 8 G15 70% 33° 2% 0
4 AM Clear 40° 35° 0% 0.00 in N 8 G14 73% 32° 2% 0
5 AM Clear 39° 34° 0% 0.00 in N 7 G14 73% 31° 2% 0
6 AM Sunny 38° 33° 0% 0.00 in N 7 G14 76% 31° 1% 0
7 AM Sunny 37° 32° 0% 0.00 in N 7 G14 75% 30° 1% 0
8 AM Sunny 38° 33° 0% 0.00 in N 7 G14 73% 30° 0% 0
9 AM Sunny 41° 36° 0% 0.00 in N 8 G15 62% 29° 0% 1
10 AM Sunny 46° 41° 0% 0.00 in N 9 G17 51% 29° 0% 2
11 AM Sunny 48° 44° 0% 0.00 in N 9 G17 47% 29° 0% 3
12 PM Sunny 50° 47° 0% 0.00 in N 8 G16 42% 28° 1% 3
1 PM Sunny 52° 52° 0% 0.00 in N 8 G15 39% 28° 3% 3
2 PM Sunny 53° 53° 0% 0.00 in N 7 G14 38% 28° 3% 2
3 PM Sunny 54° 54° 0% 0.00 in N 6 G12 36% 28° 3% 1
4 PM Sunny 54° 54° 0% 0.00 in N 5 36% 28° 1% 1
5 PM Sunny 52° 52° 0% 0.00 in N 3 39% 28° 0% 0
6 PM Clear 50° 50° 0% 0.00 in NE 2 44% 29° 0% 0
7 PM Clear 47° 47° 0% 0.00 in NE 2 53% 31° 0% 0
8 PM Clear 42° 42° 0% 0.00 in NE 1 67% 32° 0% 0
9 PM Clear 41° 41° 0% 0.00 in N 1 70% 32° 0% 0
10 PM Clear 40° 40° 0% 0.00 in N 2 73% 32° 2% 0
11 PM Clear 38° 38° 0% 0.00 in N 2 76% 31° 3% 0
Saturday, October 2424 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Patchy Frost 36° 36° 0% 0.00 in N 2 82% 31° 3% 0
1 AM Patchy Frost 35° 32° 0% 0.00 in NW 3 85% 31° 3% 0
2 AM Patchy Frost 34° 31° 0% 0.00 in NW 3 89% 31° 3% 0
3 AM Patchy Frost 33° 30° 0% 0.00 in NW 3 89% 30° 4% 0
4 AM Areas Of Frost 32° 29° 0% 0.00 in NW 3 92% 30° 6% 0
5 AM Areas Of Frost 32° 29° 0% 0.00 in NW 3 89% 29° 7% 0
6 AM Areas Of Frost 31° 28° 0% 0.00 in NW 3 92% 29° 6% 0
7 AM Areas Of Frost 31° 28° 0% 0.00 in NW 3 92% 29° 5% 0
8 AM Patchy Frost 33° 30° 0% 0.00 in W 3 89% 30° 5% 0
9 AM Sunny 37° 34° 0% 0.00 in W 3 79% 31° 4% 1
10 AM Sunny 43° 43° 0% 0.00 in W 2 67% 33° 3% 2
11 AM Sunny 49° 49° 0% 0.00 in W 2 56% 34° 2% 3
12 PM Sunny 53° 53° 0% 0.00 in W 2 48% 34° 2% 3
1 PM Sunny 55° 55° 0% 0.00 in NW 2 43% 33° 3% 3
2 PM Sunny 56° 56° 0% 0.00 in NW 2 42% 33° 3% 2
3 PM Sunny 58° 58° 0% 0.00 in NW 2 40% 34° 2% 1
4 PM Sunny 58° 58° 0% 0.00 in NW 2 44% 36° 2% 1
5 PM Sunny 57° 57° 0% 0.00 in NW 1 47% 37° 1% 0
6 PM Clear 54° 54° 0% 0.00 in W 1 52% 37° 1% 0
7 PM Clear 50° 50° 0% 0.00 in W 2 58% 36° 1% 0
8 PM Clear 47° 47° 0% 0.00 in W 2 63% 35° 1% 0
9 PM Clear 43° 43° 0% 0.00 in W 2 73% 35° 1% –
10 PM Clear 40° 40° 0% 0.00 in W 2 79% 34° 1% –
11 PM Clear 38° 38° 0% 0.00 in W 2 85% 34° 1% –
Sunday, October 2524 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Patchy Frost 36° 36° 0% 0.00 in W 2 92% 34° 1% –
1 AM Patchy Frost 35° 35° 0% 0.00 in W 2 92% 33° 1% –
2 AM Patchy Frost 34° 34° 0% 0.00 in W 2 96% 33° 1% –
3 AM Patchy Frost 34° 34° 0% 0.00 in W 2 92% 32° 1% –
4 AM Patchy Frost 33° 33° 0% 0.00 in W 2 96% 32° 2% –
5 AM Patchy Frost 33° 33° 0% 0.00 in W 2 92% 31° 2% –
6 AM Areas Of Frost 32° 32° 0% 0.00 in W 2 96% 31° 3% –
7 AM Areas Of Frost 32° 32° 0% 0.00 in W 2 92% 30° 3% –
8 AM Patchy Frost 34° 34° 0% 0.00 in W 2 89% 31° 4% –
9 AM Sunny 40° 40° 0% 0.00 in W 2 76% 33° 3% –
10 AM Sunny 47° 47° 0% 0.00 in W 2 63% 35° 3% –
11 AM Sunny 54° 54° 0% 0.00 in W 2 52% 37° 2% –
12 PM Sunny 58° 58° 0% 0.00 in W 2 45% 37° 2% –
1 PM Sunny 61° 61° 0% 0.00 in SW 3 39% 36° 2% –
2 PM Sunny 62° 62° 0% 0.00 in SW 3 38% 36° 2% –
3 PM Sunny 63° 63° 0% 0.00 in SW 3 39% 38° 2% –
4 PM Sunny 62° 62° 0% 0.00 in SW 2 44% 40° 2% –
5 PM Sunny 60° 60° 0% 0.00 in SW 2 49% 41° 1% –
6 PM Clear 56° 56° 0% 0.00 in SW 2 57% 41° 2% –
7 PM Clear 52° 52° 0% 0.00 in SW 3 63% 40° 2% –
8 PM Clear 50° 49° 0% 0.00 in SW 3 66% 39° 3% –
9 PM Clear 47° 46° 0% 0.00 in SW 3 74% 39° 3% –
10 PM Clear 45° 44° 0% 0.00 in SW 3 76% 38° 3% –
11 PM Clear 43° 41° 0% 0.00 in SW 3 82% 38° 3% –
Monday, October 2624 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Clear 42° 40° 0% 0.00 in SW 3 86% 38° 3% –
1 AM Clear 41° 39° 0% 0.00 in SW 3 86% 37° 3% –
2 AM Clear 41° 39° 0% 0.00 in SW 3 86% 37° 5% –
3 AM Clear 40° 38° 0% 0.00 in SW 3 89% 37° 5% –
4 AM Clear 39° 37° 0% 0.00 in SW 3 89% 36° 5% –
5 AM Clear 38° 36° 0% 0.00 in SW 3 92% 36° 5% –
6 AM Sunny 37° 34° 0% 0.00 in W 3 96% 36° 5% –
7 AM Sunny 37° 34° 0% 0.00 in W 3 92% 35° 5% –
8 AM Sunny 39° 37° 0% 0.00 in W 3 89% 36° 5% –
9 AM Sunny 44° 42° 0% 0.00 in W 3 79% 38° 5% –
10 AM Sunny 51° 51° 0% 0.00 in W 3 68% 41° 5% –
11 AM Sunny 57° 57° 0% 0.00 in W 3 59% 43° 5% –
12 PM Sunny 61° 61° 0% 0.00 in W 3 53% 44° 5% –
1 PM Sunny 64° 64° 0% 0.00 in W 3 48% 44° 5% –
2 PM Sunny 65° 65° 0% 0.00 in W 3 46% 44° 9% –
3 PM Sunny 66° 66° 0% 0.00 in W 3 47% 45° 9% –
4 PM Sunny 66° 66° 0% 0.00 in W 2 48% 46° 9% –
5 PM Sunny 65° 65° 0% 0.00 in W 2 52% 47° 9% –
6 PM Mostly Clear 63° 63° 0% 0.00 in W 2 56% 47° 9% –
7 PM Mostly Clear 59° 59° 0% 0.00 in W 3 62% 46° 9% –
8 PM Mostly Clear 56° 56° 0% 0.00 in W 3 66% 45° 17% –
9 PM Mostly Clear 53° 53° 0% 0.00 in W 3 74% 45° 17% –
10 PM Mostly Clear 51° 51° 0% 0.00 in NW 3 77% 44° 17% –
11 PM Mostly Clear 49° 48° 0% 0.00 in NW 3 83% 44° 17% –
Tuesday, October 2724 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 48° 47° 0% 0.00 in NW 3 86% 44° 17% –
1 AM Mostly Clear 47° 45° 0% 0.00 in NW 5 86% 43° 17% –
2 AM Partly Cloudy 47° 45° 0% 0.00 in NW 5 86% 43° 36% –
3 AM Partly Cloudy 47° 45° 0% 0.00 in NW 5 86% 43° 36% –
4 AM Partly Cloudy 46° 44° 0% 0.00 in NW 5 86% 42° 36% –
5 AM Partly Cloudy 46° 44° 1% 0.00 in NW 5 86% 42° 36% –
6 AM Mostly Sunny 45° 43° 0% 0.00 in N 5 89% 42° 36% –
7 AM Mostly Sunny 44° 41° 0% 0.00 in N 6 89% 41° 36% –
8 AM Mostly Sunny 44° 41° 0% 0.00 in N 6 89% 41° 41% –
9 AM Mostly Sunny 46° 43° 0% 0.00 in N 6 86% 42° 41% –
10 AM Mostly Sunny 50° 47° 0% 0.00 in N 7 74% 42° 41% –
11 AM Mostly Sunny 53° 53° 0% 0.00 in N 7 69% 43° 41% –
12 PM Mostly Sunny 55° 55° 0% 0.00 in N 7 64% 43° 41% –
1 PM Mostly Sunny 55° 55° 1% 0.00 in N 6 G12 61% 42° 41% –
2 PM Sunny 56° 56° 1% 0.00 in N 6 G12 59% 42° 25% –
3 PM Sunny 57° 57° 1% 0.00 in N 6 57% 42° 25% –
4 PM Sunny 57° 57° 1% 0.00 in NE 5 55% 41° 25% –
5 PM Sunny 57° 57° 1% 0.00 in NE 5 55% 41° 25% –
6 PM Mostly Clear 55° 55° 1% 0.00 in NE 3 59% 41° 25% –
7 PM Mostly Clear 53° 53° 2% 0.00 in NE 3 61% 40° 25% –
8 PM Partly Cloudy 50° 50° 2% 0.00 in NE 2 68% 40° 29% –
9 PM Partly Cloudy 48° 48° 2% 0.00 in NE 2 74% 40° 29% –
10 PM Partly Cloudy 46° 46° 2% 0.00 in NE 2 76% 39° 29% –
11 PM Partly Cloudy 44° 44° 2% 0.00 in N 2 82% 39° 29% –
Wednesday, October 2816 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Partly Cloudy 43° 43° 2% 0.00 in N 2 82% 38° 29% –
1 AM Partly Cloudy 42° 40° 2% 0.00 in N 3 86% 38° 29% –
2 AM Partly Cloudy 42° 40° 2% 0.00 in N 3 82% 37° 30% –
3 AM Partly Cloudy 41° 39° 2% 0.00 in N 3 82% 36° 30% –
4 AM Partly Cloudy 41° 39° 2% 0.00 in N 3 82% 36° 30% –
5 AM Partly Cloudy 40° 38° 2% 0.00 in N 3 82% 35° 30% –
6 AM Mostly Sunny 39° 37° 2% 0.00 in N 3 G8 85% 35° 30% –
7 AM Mostly Sunny 39° 36° 2% 0.00 in N 5 85% 35° 30% –
8 AM Mostly Sunny 40° 37° 2% 0.00 in N 5 82% 35° 32% –
9 AM Mostly Sunny 43° 40° 2% 0.00 in NE 5 76% 36° 32% –
10 AM Mostly Sunny 47° 45° 2% 0.00 in NE 5 68% 37° 32% –
11 AM Mostly Sunny 50° 48° 2% 0.00 in E 5 63% 38° 32% –
12 PM Mostly Sunny 52° 52° 2% 0.00 in E 5 59% 38° 32% –
1 PM Mostly Sunny 53° 53° 2% 0.00 in SE 5 57% 38° 32% –
2 PM Mostly Sunny 54° 54° 2% 0.00 in SE 5 55% 38° 44% –
3 PM Mostly Sunny 55° 55° 2% 0.00 in SE 5 53% 38° 44% –

National Weather Service forecast updated 3 hrs ago. Precipitation amounts are the forecast liquid equivalent for each hour.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.