Herndon, VA 20171 Hourly Weather

Fairfax County5:11 PM EDT38.93°N, 77.39°W

Next 48 hours

5 PM 8 PM 11 PM Fri Oct 23 2 AM 5 AM 8 AM 11 AM 2 PM 5 PM 8 PM 11 PM Sat Oct 24 2 AM 5 AM 8 AM 11 AM 2 PM 35° 40° 45° 50° 55° 60° 65° %
TemperatureFeels likeChance of precipitationNight
Thursday, October 227 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
5 PM Sunny 63° 63° 0% 0.00 in N 9 G18 41% 39° 3% 0
6 PM Clear 61° 61° 0% 0.00 in N 8 G16 48% 41° 0% 0
7 PM Clear 58° 58° 0% 0.00 in N 7 G15 55% 42° 0% 0
8 PM Clear 54° 54° 0% 0.00 in N 6 G13 66% 43° 1% 0
9 PM Clear 53° 53° 0% 0.00 in N 6 G14 71% 44° 0% 0
10 PM Clear 52° 52° 0% 0.00 in N 6 G14 77% 45° 1% 0
11 PM Clear 51° 51° 0% 0.00 in N 6 G13 83% 46° 2% 0
Friday, October 2324 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Clear 50° 48° 0% 0.00 in N 6 G13 86% 46° 3% 0
1 AM Clear 49° 46° 0% 0.00 in N 7 G14 89% 46° 4% 0
2 AM Clear 48° 45° 0% 0.00 in N 7 G15 93% 46° 5% 0
3 AM Clear 47° 44° 0% 0.00 in N 7 G15 96% 46° 5% 0
4 AM Mostly Clear 46° 42° 0% 0.00 in N 8 G15 96% 45° 6% 0
5 AM Mostly Clear 45° 41° 0% 0.00 in N 8 G15 100% 45° 6% 0
6 AM Sunny 44° 39° 0% 0.00 in N 8 G15 100% 44° 5% 0
7 AM Sunny 43° 39° 0% 0.00 in N 7 G14 100% 43° 4% 0
8 AM Sunny 43° 39° 0% 0.00 in N 7 G14 100% 43° 3% 0
9 AM Sunny 46° 42° 0% 0.00 in N 7 G14 86% 42° 3% 1
10 AM Sunny 49° 46° 0% 0.00 in N 8 G14 74% 41° 4% 2
11 AM Sunny 53° 53° 0% 0.00 in NE 8 G14 61% 40° 4% 3
12 PM Sunny 56° 56° 0% 0.00 in NE 8 51% 38° 4% 4
1 PM Sunny 58° 58° 0% 0.00 in NE 7 G13 45% 37° 4% 4
2 PM Sunny 59° 59° 0% 0.00 in NE 6 G12 42% 36° 4% 4
3 PM Sunny 60° 60° 0% 0.00 in NE 6 G12 41% 36° 5% –
4 PM Sunny 59° 59° 0% 0.00 in NE 5 G10 42% 36° 6% –
5 PM Sunny 58° 58° 0% 0.00 in NE 5 G10 45% 37° 7% –
6 PM Mostly Clear 55° 55° 0% 0.00 in NE 5 53% 38° 8% –
7 PM Mostly Clear 51° 51° 0% 0.00 in NE 3 G8 61% 38° 8% –
8 PM Mostly Clear 48° 47° 0% 0.00 in NE 3 71% 39° 9% –
9 PM Mostly Clear 46° 46° 0% 0.00 in NE 2 76% 39° 8% –
10 PM Mostly Clear 45° 45° 0% 0.00 in NE 2 82% 40° 8% –
11 PM Mostly Clear 44° 44° 0% 0.00 in NE 1 86% 40° 7% –
Saturday, October 2424 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 43° 43° 0% 0.00 in NE 1 89% 40° 7% –
1 AM Mostly Clear 42° 42° 0% 0.00 in NE 1 89% 39° 6% –
2 AM Mostly Clear 41° 41° 0% 0.00 in NE 1 92% 39° 6% –
3 AM Mostly Clear 40° 40° 0% 0.00 in NE 1 96% 39° 6% –
4 AM Mostly Clear 39° 39° 0% 0.00 in N 1 96% 38° 7% –
5 AM Mostly Clear 38° 38° 0% 0.00 in N 1 100% 38° 7% –
6 AM Patchy Frost 37° 37° 0% 0.00 in N 1 100% 37° 7% –
7 AM Patchy Frost 36° 36° 0% 0.00 in N 2 100% 36° 6% –
8 AM Patchy Frost 37° 37° 0% – N 2 100% 37° 6% –
9 AM Sunny 41° 41° 0% – N 2 89% 38° 5% –
10 AM Sunny 47° 47° 0% – NE 2 74% 39° 4% –
11 AM Sunny 52° 52° 0% – E 2 63% 40° 3% –
12 PM Sunny 55° 55° 0% – E 2 57% 40° 4% –
1 PM Sunny 57° 57° 0% – E 2 51% 39° 4% –
2 PM Sunny 59° 59° 0% – SE 2 45% 38° 5% –
3 PM Sunny 60° 60° 0% – SE 2 44% 38° 8% –
4 PM Sunny 60° 60° 0% – E 2 44% 38° 12% –
5 PM Sunny 58° 58° 0% – E 2 49% 39° 15% –
6 PM Mostly Clear 55° 55° 0% – E 2 57% 40° 14% –
7 PM Mostly Clear 51° 51° 0% – E 2 68% 41° 12% –
8 PM Mostly Clear 51° 51° 0% – E 2 71% 42° 11% –
9 PM Mostly Clear 48° 48° 0% – E 2 83% 43° 11% –
10 PM Mostly Clear 46° 46° 0% – E 1 93% 44° 11% –
11 PM Mostly Clear 44° 44° 0% – SE 1 100% 44° 11% –
Sunday, October 2524 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 43° 43° 0% – E 1 100% 43° 11% –
1 AM Mostly Clear 42° 42° 0% – Calm 100% 42° 11% –
2 AM Mostly Clear 42° 42° 0% – Calm 100% 42° 6% –
3 AM Mostly Clear 42° 42° 0% – Calm 100% 42° 6% –
4 AM Mostly Clear 41° 41° 0% – Calm 100% 41° 6% –
5 AM Mostly Clear 41° 41° 0% – Calm 100% 41° 6% –
6 AM Sunny 40° 40° 0% – Calm 100% 40° 6% –
7 AM Sunny 39° 39° 0% – N 1 100% 39° 6% –
8 AM Sunny 40° 40° 0% – NW 1 100% 40° 13% –
9 AM Sunny 44° 44° 0% – N 1 93% 42° 13% –
10 AM Sunny 49° 49° 0% – E 1 83% 44° 13% –
11 AM Sunny 54° 54° 0% – SE 1 71% 45° 13% –
12 PM Sunny 58° 58° 0% – SE 1 62% 45° 13% –
1 PM Sunny 60° 60° 0% – SE 2 55% 44° 13% –
2 PM Sunny 62° 62° 0% – S 2 50% 43° 4% –
3 PM Sunny 63° 63° 0% – S 2 48% 43° 4% –
4 PM Sunny 64° 64° 0% – S 2 48% 44° 4% –
5 PM Sunny 63° 63° 0% – S 2 52% 45° 4% –
6 PM Clear 61° 61° 0% – S 2 58% 46° 4% –
7 PM Clear 57° 57° 0% – SE 2 67% 46° 4% –
8 PM Mostly Clear 54° 54° 0% – SE 2 77% 47° 7% –
9 PM Mostly Clear 52° 52° 0% – SE 2 86% 48° 7% –
10 PM Mostly Clear 50° 50° 0% – S 1 93% 48° 7% –
11 PM Mostly Clear 48° 48° 0% – S 1 100% 48° 7% –
Monday, October 2624 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 47° 47° 0% – S 1 100% 47° 7% –
1 AM Mostly Clear 46° 46° 0% – SW 1 100% 46° 7% –
2 AM Mostly Clear 45° 45° 0% – SW 1 100% 45° 7% –
3 AM Mostly Clear 44° 44° 0% – W 1 100% 44° 7% –
4 AM Mostly Clear 43° 43° 0% – W 1 100% 43° 7% –
5 AM Mostly Clear 43° 43° 0% – W 1 100% 43° 7% –
6 AM Sunny 42° 42° 0% – W 1 100% 42° 7% –
7 AM Sunny 42° 42° 0% – W 2 100% 42° 7% –
8 AM Sunny 43° 43° 0% – W 2 96% 42° 18% –
9 AM Sunny 46° 46° 0% – W 2 89% 43° 18% –
10 AM Sunny 51° 51° 0% – W 2 80% 45° 18% –
11 AM Sunny 56° 56° 0% – W 2 69% 46° 18% –
12 PM Sunny 60° 60° 0% – W 2 62% 47° 18% –
1 PM Sunny 64° 64° 0% – W 3 54% 47° 18% –
2 PM Sunny 66° 66° 0% – W 3 50% 47° 12% –
3 PM Sunny 67° 67° 0% – W 3 49% 47° 12% –
4 PM Sunny 67° 67° 0% – W 2 50% 48° 12% –
5 PM Sunny 66° 66° 0% – W 2 52% 48° 12% –
6 PM Mostly Clear 64° 64° 0% – W 2 58% 49° 12% –
7 PM Mostly Clear 61° 61° 0% – SW 2 65% 49° 12% –
8 PM Mostly Clear 58° 58° 0% – SW 2 75% 50° 20% –
9 PM Mostly Clear 56° 56° 0% – SW 2 80% 50° 20% –
10 PM Mostly Clear 54° 54° 0% – W 2 86% 50° 20% –
11 PM Mostly Clear 52° 52° 0% – W 2 93% 50° 20% –
Tuesday, October 2724 hours
Time Conditions Temp Feels Precip Amount Wind Humidity Dew point Clouds UV
12 AM Mostly Clear 51° 51° 0% – W 2 93% 49° 20% –
1 AM Mostly Clear 50° 50° 0% – W 2 96% 49° 20% –
2 AM Partly Cloudy 50° 50° 0% – W 2 93% 48° 28% –
3 AM Partly Cloudy 49° 49° 0% – W 2 96% 48° 28% –
4 AM Partly Cloudy 49° 48° 0% – NW 3 93% 47° 28% –
5 AM Partly Cloudy 48° 47° 0% – NW 3 G8 96% 47° 28% –
6 AM Mostly Sunny 47° 45° 0% – NW 5 96% 46° 28% –
7 AM Mostly Sunny 47° 45° 0% – NW 5 G10 96% 46° 28% –
8 AM Mostly Sunny 48° 45° 0% – NW 6 G12 93% 46° 33% –
9 AM Mostly Sunny 51° 51° 0% – NW 6 G12 86% 47° 33% –
10 AM Mostly Sunny 54° 54° 0% – N 6 G12 80% 48° 33% –
11 AM Mostly Sunny 58° 58° 0% – N 6 G12 72% 49° 33% –
12 PM Mostly Sunny 61° 61° 0% – N 6 G12 65% 49° 33% –
1 PM Mostly Sunny 63° 63° 0% – N 6 G12 60% 49° 33% –
2 PM Mostly Sunny 64° 64° 0% – N 6 G12 58% 49° 36% –
3 PM Mostly Sunny 65° 65° 0% – N 6 G12 56% 49° 36% –
4 PM Mostly Sunny 66° 66° 0% – N 5 G10 54% 49° 36% –
5 PM Mostly Sunny 65° 65° 0% – N 5 G10 56% 49° 36% –
6 PM Partly Cloudy 63° 63° 0% – N 5 60% 49° 36% –
7 PM Partly Cloudy 61° 61° 0% – N 5 67% 50° 36% –
8 PM Partly Cloudy 58° 58° 0% – N 5 75% 50° 39% –
9 PM Partly Cloudy 56° 56° 0% – N 5 80% 50° 39% –
10 PM Partly Cloudy 54° 54° 0% – N 3 G9 86% 50° 39% –
11 PM Partly Cloudy 52° 52° 0% – N 3 G9 93% 50° 39% –

National Weather Service forecast updated 1 day 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.