Hourly Weather Forecast for Herndon, 20170, Virginia, United States - The Weather Channel | Weather.com

Hourly Weather

Location: Herndon, 20170, Virginia, United States · as of 9:18 p.m. EDT

Tomorrow's maximum UV index will be a little higher than today's

Friday, August 14

Time Temperature Condition Rain Probability Humidity Wind Precipitation
21:15 77° Mostly Cloudy 2% 81% 4 mph 0 in
21:30 76° Mostly Cloudy 2% 82% 4 mph 0 in
21:45 76° Mostly Cloudy 7% 83% 4 mph 0 in
22:00 76° Partly Cloudy 6% 84% 4 mph 0 in
22:15 75° Partly Cloudy 4% 85% 4 mph 0 in
23:00 75° Partly Cloudy 2% 88% 4 mph 0 in

Saturday, August 15

Time Temperature Condition Rain Probability Humidity Wind Precipitation
00:00 74° Partly Cloudy 3% 90% 4 mph 0 in
01:00 73° Partly Cloudy 3% 94% 3 mph 0 in
02:00 72° Partly Cloudy 3% 97% 3 mph 0 in
03:00 72° Partly Cloudy 3% 97% 3 mph 0 in
04:00 71° Partly Cloudy 5% 97% 4 mph 0 in
05:00 70° Partly Cloudy 8% 96% 4 mph 0 in
06:00 70° Partly Cloudy 7% 94% 4 mph 0 in
07:00 70° Partly Cloudy 7% 94% 4 mph 0 in
08:00 73° Partly Cloudy 6% 85% 4 mph 0 in
09:00 75° Partly Cloudy 4% 78% 5 mph 0 in
10:00 78° Mostly Clear 2% 70% 4 mph 0 in
11:00 81° Mostly Clear 1% 62% 4 mph 0 in
12:00 83° Partly Cloudy 1% 58% 4 mph 0 in
13:00 84° Partly Cloudy 3% 56% 4 mph 0 in
14:00 85° Partly Cloudy 2% 54% 4 mph 0 in
15:00 86° Partly Cloudy 0% 54% 4 mph 0 in
16:00 86° Mostly Cloudy 0% 53% 4 mph 0 in
17:00 85° Partly Cloudy 0% 55% 5 mph 0 in
18:00 84° Mostly Cloudy 0% 55% 5 mph 0 in
19:00 83° Mostly Cloudy 1% 59% 6 mph 0 in
20:00 80° Mostly Cloudy 1% 64% 4 mph 0 in
21:00 79° Mostly Cloudy 2% 67% 3 mph 0 in
22:00 77° Mostly Cloudy 2% 73% 4 mph 0 in
23:00 76° Mostly Cloudy 5% 77% 5 mph 0 in

Sunday, August 16

Time Temperature Condition Rain Probability Humidity Wind Precipitation
00:00 76° Cloudy 8% 80% 4 mph 0 in
01:00 75° Cloudy 10% 84% 4 mph 0 in
02:00 75° Mostly Cloudy 15% 85% 5 mph 0 in
03:00 75° Mostly Cloudy 8% 88% 5 mph 0 in
04:00 75° Mostly Cloudy 13% 88% 5 mph 0 in
05:00 74° Cloudy 10% 89% 5 mph 0 in
06:00 74° Cloudy 23% 90% 6 mph 0 in
07:00 74° Showers 32% 92% 6 mph 0.01 in
08:00 75° Rain 60% 91% 8 mph 0.04 in
09:00 75° Showers 58% 89% 9 mph 0.02 in
10:00 76° Thunderstorms 76% 88% 9 mph 0.04 in
11:00 76° Thunderstorms 66% 90% 10 mph 0.04 in
12:00 77° Thunderstorms 62% 90% 10 mph 0.05 in
13:00 76° Thunderstorms 90% 94% 11 mph 0.13 in
14:00 77° Scattered Thunderstorms 59% 95% 10 mph 0.04 in
15:00 79° Scattered Thunderstorms 59% 86% 9 mph 0.03 in
16:00 80° Thunderstorms 81% 84% 8 mph 0.05 in
17:00 80° Thunderstorms 80% 88% 9 mph 0.12 in
18:00 81° Scattered Thunderstorms 53% 85% 8 mph 0.05 in
19:00 80° Scattered Thunderstorms 38% 85% 9 mph 0.01 in
20:00 79° Mostly Cloudy 24% 90% 7 mph 0 in
21:00 78° Scattered Thunderstorms Night 35% 91% 6 mph 0.01 in

Air Quality Index

61 - Moderate

Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

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