Weather in Herndon, Virginia
Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →
Herndon, VA
Sunday, May 17 at 1:31 AM
72
°
Mostly Clear
Feels like
76°
Humidity
72%
Wind
1 mph
Sunrise
5:55 AM
Sunset
8:16 PM
Herndon, VA
Hour by hour · 24h
54°
9p
53°
10p
52°
11p
52°
12a
51°
1a
50°
2a
51°
3a
52°
4a
51°
5a
51°
6a
52°
7a
54°
8a
57°
9a
59°
10a
62°
11a
64°
12p
66°
1p
68°
2p
70°
3p
71°
4p
72°
5p
72°
6p
70°
7p
67°
8p
Herndon, VA
7-day forecast
- TodayMay 16Overcast29%84°47°
- SundayMay 17Heavy Drizzle15%87°61°
- MondayMay 18Light Showers11%95°63°
- TuesdayMay 19Overcast—94°64°
- WednesdayMay 20Showers69%94°66°
- ThursdayMay 21Light Drizzle49%63°55°
- FridayMay 22Drizzle49%57°50°
Herndon, VA
Next 24 hours · Cool now
Herndon, VA
Anemometer · 24h winds · from true
From · True
WNW
284° · veering 39°
Direction
WNW
284°
Sustained
1
mph
Gust
5
mph
Peak 24h
19
avg 5
Beaufort · 1 · LIGHT AIR
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
−24h−18h−12h−6hnow
Herndon, VA
Air quality
88
AQI
Moderate
- PM 2.5
- 11.8 μg/m³
- PM 10
- 12.2 μg/m³
- NO₂
- 9.0 μg/m³
- Ozone
- 107.0 μg/m³
- UV Index
- 0.0 Low
Herndon, VA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
9:27 AM
Sunrise
5:55 AM
Daylight
14h 21m
Sunset
8:16 PM
Civil dusk
12:47 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Herndon, VA
The moon
New Moon
0% illuminated
- Moonrise
- 10:00 AM
- Moonset
- 12:42 AM
- In sign
- ♉︎ Taurus
Herndon, VA
Microseason · 28 of 72
May 16–20
Roses open along the stoops
plant
Herndon at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 10 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Warm-season window is open
As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.