Waltham, MA 02451 Hourly Weather

Middlesex County7:22 AM EDT42.40°N, 71.25°W

Next 48 hours

7 AM 10 AM 1 PM 4 PM 7 PM 10 PM Thu Oct 22 1 AM 4 AM 7 AM 10 AM 1 PM 4 PM 7 PM 10 PM Fri Oct 23 1 AM 4 AM 30° 35° 40° 45° 50° 55° 60° %
TemperatureFeels likeChance of precipitationNight
Wednesday, October 2117 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
7 AM Partly Sunny 39° 33° 0% 0.00 in N 9 G18 92% 37° 60% 0
8 AM Mostly Cloudy 40° 34° 0% 0.00 in N 9 G21 92% 38° 77% 0
9 AM Mostly Cloudy 42° 36° 0% 0.00 in N 10 G22 86% 38° 70% 1
10 AM Partly Sunny 46° 41° 0% 0.00 in N 12 G22 73% 38° 62% 2
11 AM Partly Sunny 48° 43° 0% 0.00 in NE 13 G22 68% 38° 54% 3
12 PM Partly Sunny 50° 45° 0% 0.00 in NE 13 G23 63% 38° 54% 4
1 PM Partly Sunny 52° 52° 0% 0.00 in NE 13 G23 59% 38° 54% 4
2 PM Partly Sunny 52° 52° 0% 0.00 in NE 13 G23 59% 38° 54% 3
3 PM Partly Sunny 52° 52° 1% 0.00 in NE 12 G23 59% 38° 58% 2
4 PM Partly Sunny 52° 52° 2% 0.00 in NE 12 G22 59% 38° 63% 1
5 PM Partly Sunny 52° 52° 3% 0.00 in NE 10 G20 59% 38° 67% 0
6 PM Mostly Cloudy 50° 46° 3% 0.00 in NE 10 G18 66% 39° 66% 0
7 PM Mostly Cloudy 49° 45° 4% 0.00 in NE 9 G16 71% 40° 65% 0
8 PM Mostly Cloudy 48° 44° 5% 0.00 in NE 8 G15 77% 41° 64% 0
9 PM Mostly Cloudy 47° 43° 6% 0.00 in NE 9 G15 79% 41° 67% 0
10 PM Mostly Cloudy 46° 41° 6% 0.00 in N 9 G15 79% 40° 70% 0
11 PM Mostly Cloudy 46° 41° 6% 0.00 in N 9 G15 79% 40° 73% 0
Thursday, October 2224 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Cloudy 45° 40° 5% 0.00 in N 9 G15 79% 39° 70% 0
1 AM Mostly Cloudy 45° 40° 4% 0.00 in N 10 79% 39° 67% 0
2 AM Mostly Cloudy 45° 40° 2% 0.00 in N 10 76% 38° 65% 0
3 AM Mostly Cloudy 44° 38° 2% 0.00 in N 10 G16 76% 37° 65% 0
4 AM Mostly Cloudy 44° 38° 2% 0.00 in N 10 G16 73% 36° 65% 0
5 AM Mostly Cloudy 44° 38° 2% 0.00 in N 10 G17 73% 36° 65% 0
6 AM Partly Sunny 43° 37° 2% 0.00 in N 10 G17 73% 35° 59% 0
7 AM Partly Sunny 43° 38° 1% 0.00 in N 9 G18 73% 35° 53% 0
8 AM Mostly Sunny 44° 39° 0% 0.00 in N 9 G18 70% 35° 47% 0
9 AM Mostly Sunny 45° 40° 0% 0.00 in N 9 G18 65% 34° 46% 1
10 AM Mostly Sunny 50° 46° 0% 0.00 in N 9 G20 54% 34° 45% 2
11 AM Mostly Sunny 52° 52° 0% 0.00 in N 10 G21 48% 33° 44% 3
12 PM Mostly Sunny 55° 55° 0% 0.00 in N 10 G22 43% 33° 41% 3
1 PM Mostly Sunny 58° 58° 0% 0.00 in N 10 G22 39% 33° 37% 3
2 PM Mostly Sunny 59° 59° 0% 0.00 in N 10 G21 37% 33° 34% 3
3 PM Mostly Sunny 60° 60° 0% 0.00 in N 10 G21 37% 34° 26% 2
4 PM Sunny 60° 60° 0% 0.00 in N 10 G20 41% 36° 17% 1
5 PM Sunny 59° 59° 0% 0.00 in N 10 G20 44% 37° 9% 0
6 PM Mostly Clear 58° 58° 0% 0.00 in N 10 G21 45% 37° 9% 0
7 PM Mostly Clear 55° 55° 0% 0.00 in N 12 G22 53% 38° 8% 0
8 PM Mostly Clear 52° 52° 0% 0.00 in N 12 G22 59% 38° 11% 0
9 PM Mostly Clear 50° 46° 0% 0.00 in N 12 G21 63% 38° 10% 0
10 PM Mostly Clear 48° 43° 0% 0.00 in N 10 G20 65% 37° 10% 0
11 PM Mostly Clear 47° 43° 0% 0.00 in N 9 G18 63% 35° 10% 0
Friday, October 2324 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 45° 40° 0% 0.00 in N 9 G17 65% 34° 12% 0
1 AM Mostly Clear 44° 39° 0% 0.00 in N 9 G16 62% 32° 13% 0
2 AM Mostly Clear 42° 36° 0% 0.00 in N 9 G16 65% 31° 15% 0
3 AM Mostly Clear 40° 34° 0% 0.00 in N 9 G16 67% 30° 12% 0
4 AM Mostly Clear 39° 33° 0% 0.00 in N 9 G16 67% 29° 10% 0
5 AM Mostly Clear 38° 32° 0% 0.00 in N 9 G17 70% 29° 7% 0
6 AM Sunny 37° 30° 0% 0.00 in N 9 G17 72% 29° 7% 0
7 AM Sunny 37° 30° 0% 0.00 in N 9 G18 72% 29° 7% 0
8 AM Sunny 37° 30° 0% 0.00 in N 9 G18 72% 29° 7% 0
9 AM Sunny 40° 34° 0% 0.00 in N 9 G20 64% 29° 6% 1
10 AM Sunny 43° 37° 0% 0.00 in N 10 G21 57% 29° 4% 2
11 AM Sunny 46° 41° 0% 0.00 in N 10 G22 51% 29° 3% 3
12 PM Sunny 48° 43° 0% 0.00 in N 10 G22 47% 29° 3% 3
1 PM Sunny 50° 46° 0% 0.00 in N 10 G21 42% 28° 3% 3
2 PM Sunny 52° 52° 0% 0.00 in N 9 G18 39% 28° 3% 2
3 PM Sunny 53° 53° 0% 0.00 in N 8 G16 38% 28° 2% 1
4 PM Sunny 53° 53° 0% 0.00 in N 7 G14 39% 29° 2% 1
5 PM Sunny 52° 52° 0% 0.00 in N 6 G12 43% 30° 1% 0
6 PM Clear 50° 48° 0% 0.00 in N 5 48% 31° 2% 0
7 PM Clear 47° 46° 0% 0.00 in N 3 G8 53% 31° 3% 0
8 PM Clear 44° 42° 0% 0.00 in N 3 60% 31° 4% 0
9 PM Mostly Clear 42° 40° 0% 0.00 in N 3 65% 31° 8% –
10 PM Mostly Clear 40° 38° 0% 0.00 in N 3 67% 30° 11% –
11 PM Mostly Clear 38° 36° 0% 0.00 in N 3 73% 30° 15% –
Saturday, October 2424 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 37° 34° 0% 0.00 in N 3 75% 30° 14% –
1 AM Patchy Frost 36° 33° 0% 0.00 in NW 3 79% 30° 14% –
2 AM Patchy Frost 35° 32° 0% 0.00 in NW 3 82% 30° 13% –
3 AM Patchy Frost 34° 31° 0% 0.00 in NW 3 85% 30° 14% –
4 AM Patchy Frost 34° 31° 0% 0.00 in NW 3 82% 29° 16% –
5 AM Patchy Frost 33° 30° 0% 0.00 in NW 3 85% 29° 17% –
6 AM Areas Of Frost 32° 29° 0% 0.00 in NW 3 89% 29° 15% –
7 AM Areas Of Frost 32° 29° 0% 0.00 in NW 3 89% 29° 14% –
8 AM Patchy Frost 33° 30° 0% 0.00 in W 3 85% 29° 13% –
9 AM Sunny 37° 34° 0% 0.00 in W 3 75% 30° 10% –
10 AM Sunny 42° 39° 0% 0.00 in W 5 65% 31° 7% –
11 AM Sunny 47° 45° 0% 0.00 in W 5 56% 32° 4% –
12 PM Sunny 51° 51° 0% 0.00 in W 5 48% 32° 4% –
1 PM Sunny 54° 54° 0% 0.00 in W 5 41% 31° 3% –
2 PM Sunny 56° 56° 0% 0.00 in W 5 38% 31° 3% –
3 PM Sunny 57° 57° 0% 0.00 in W 3 40% 33° 3% –
4 PM Sunny 57° 57° 0% 0.00 in W 3 42% 34° 2% –
5 PM Sunny 56° 56° 0% 0.00 in SW 2 47% 36° 2% –
6 PM Clear 53° 53° 0% 0.00 in SW 2 52% 36° 2% –
7 PM Clear 50° 50° 0% 0.00 in SW 2 58% 36° 2% –
8 PM Clear 46° 46° 0% 0.00 in SW 2 65% 35° 3% –
9 PM Clear 44° 44° 0% 0.00 in SW 2 70% 35° 3% –
10 PM Clear 42° 42° 0% 0.00 in W 2 73% 34° 3% –
11 PM Clear 40° 40° 0% 0.00 in W 2 79% 34° 3% –
Sunday, October 2524 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Clear 39° 39° 0% 0.00 in W 2 82% 34° 3% –
1 AM Clear 38° 38° 0% 0.00 in W 2 82% 33° 3% –
2 AM Clear 37° 37° 0% 0.00 in W 2 85% 33° 3% –
3 AM Clear 36° 36° 0% 0.00 in W 2 89% 33° 3% –
4 AM Clear 35° 35° 0% 0.00 in W 2 89% 32° 3% –
5 AM Clear 35° 35° 0% 0.00 in W 2 89% 32° 3% –
6 AM Sunny 34° 34° 0% 0.00 in W 2 92% 32° 3% –
7 AM Sunny 33° 33° 0% 0.00 in W 2 96% 32° 3% –
8 AM Sunny 35° 35° 0% 0.00 in W 2 92% 33° 1% –
9 AM Sunny 40° 40° 0% 0.00 in W 2 82% 35° 1% –
10 AM Sunny 47° 47° 0% 0.00 in W 2 68% 37° 1% –
11 AM Sunny 53° 53° 0% 0.00 in SW 2 57% 38° 1% –
12 PM Sunny 57° 57° 0% 0.00 in SW 3 49% 38° 1% –
1 PM Sunny 60° 60° 0% 0.00 in SW 3 G8 44% 38° 1% –
2 PM Sunny 62° 62° 0% 0.00 in SW 5 41% 38° 3% –
3 PM Sunny 63° 63° 0% 0.00 in SW 5 41% 39° 3% –
4 PM Sunny 63° 63° 0% 0.00 in SW 3 43% 40° 3% –
5 PM Sunny 62° 62° 0% 0.00 in SW 3 46% 41° 3% –
6 PM Clear 60° 60° 0% 0.00 in SW 3 49% 41° 3% –
7 PM Clear 56° 56° 0% 0.00 in SW 5 57% 41° 3% –
8 PM Mostly Clear 53° 53° 0% 0.00 in SW 5 64% 41° 7% –
9 PM Mostly Clear 50° 48° 0% 0.00 in SW 5 71% 41° 7% –
10 PM Mostly Clear 48° 46° 0% 0.00 in SW 5 74% 40° 7% –
11 PM Mostly Clear 46° 44° 0% 0.00 in SW 5 79% 40° 7% –
Monday, October 2624 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 45° 43° 0% 0.00 in SW 5 82% 40° 7% –
1 AM Mostly Clear 44° 41° 0% 0.00 in SW 5 82% 39° 7% –
2 AM Mostly Clear 44° 41° 0% 0.00 in SW 5 82% 39° 11% –
3 AM Mostly Clear 43° 40° 0% 0.00 in SW 5 86% 39° 11% –
4 AM Mostly Clear 43° 40° 1% 0.00 in SW 5 82% 38° 11% –
5 AM Mostly Clear 42° 39° 1% 0.00 in SW 5 86% 38° 11% –
6 AM Sunny 41° 38° 1% 0.00 in SW 5 89% 38° 11% –
7 AM Sunny 41° 38° 1% 0.00 in W 5 89% 38° 11% –
8 AM Sunny 42° 39° 0% 0.00 in W 5 89% 39° 18% –
9 AM Sunny 46° 44° 0% 0.00 in W 5 79% 40° 18% –
10 AM Sunny 52° 52° 0% 0.00 in W 5 69% 42° 18% –
11 AM Sunny 57° 57° 0% 0.00 in W 5 59% 43° 18% –
12 PM Sunny 61° 61° 0% 0.00 in W 5 53% 44° 18% –
1 PM Sunny 63° 63° 0% 0.00 in W 5 52% 45° 18% –
2 PM Sunny 65° 65° 0% 0.00 in W 5 48% 45° 17% –
3 PM Sunny 66° 66° 0% 0.00 in W 5 48% 46° 17% –
4 PM Sunny 66° 66° 0% 0.00 in W 3 G8 48% 46° 17% –
5 PM Sunny 65° 65° 0% 0.00 in W 3 50% 46° 17% –
6 PM Mostly Clear 63° 63° 0% 0.00 in W 3 54% 46° 17% –
7 PM Mostly Clear 59° 59° 0% 0.00 in W 3 62% 46° 17% –
8 PM Mostly Clear 56° 56° 0% 0.00 in W 3 66% 45° 21% –
9 PM Mostly Clear 54° 54° 0% 0.00 in W 3 69% 44° 21% –
10 PM Mostly Clear 52° 52° 0% 0.00 in W 3 74% 44° 21% –
11 PM Mostly Clear 50° 49° 0% 0.00 in W 3 77% 43° 21% –
Tuesday, October 2718 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 49° 48° 0% 0.00 in W 3 80% 43° 21% –
1 AM Mostly Clear 48° 47° 0% 0.00 in NW 3 80% 42° 21% –
2 AM Partly Cloudy 47° 46° 2% 0.00 in NW 3 G8 83% 42° 32% –
3 AM Partly Cloudy 46° 45° 2% 0.00 in NW 3 G8 86% 42° 32% –
4 AM Partly Cloudy 46° 44° 2% 0.00 in NW 5 83% 41° 32% –
5 AM Partly Cloudy 45° 43° 2% 0.00 in NW 5 86% 41° 32% –
6 AM Mostly Sunny 44° 41° 2% 0.00 in NW 5 89% 41° 32% –
7 AM Mostly Sunny 44° 41° 2% 0.00 in NW 6 89% 41° 32% –
8 AM Mostly Sunny 44° 41° 2% 0.00 in NW 6 89% 41° 46% –
9 AM Mostly Sunny 46° 43° 3% 0.00 in NW 6 83% 41° 46% –
10 AM Mostly Sunny 49° 46° 3% 0.00 in N 7 77% 42° 46% –
11 AM Mostly Sunny 52° 52° 3% 0.00 in N 7 69% 42° 46% –
12 PM Mostly Sunny 54° 54° 3% 0.00 in N 7 G13 64% 42° 46% –
1 PM Mostly Sunny 55° 55° 3% 0.00 in N 7 G13 61% 42° 46% –
2 PM Mostly Sunny 56° 56° 2% 0.00 in N 7 G13 59% 42° 48% –
3 PM Mostly Sunny 57° 57° 2% 0.00 in N 7 55% 41° 48% –
4 PM Mostly Sunny 57° 57° 2% 0.00 in N 6 55% 41° 48% –
5 PM Mostly Sunny 56° 56° 2% 0.00 in N 6 55% 40° 48% –

National Weather Service forecast updated 4 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 4Search index and reflects what the press published. Terms of use.