Weather in Flat Rock, Illinois
Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →
Flat Rock, IL
Sunday, May 17 at 3:53 AM
64
°
Clear
Feels like
66°
Humidity
93%
Wind
5 mph
Sunrise
5:36 AM
Sunset
7:57 PM
Flat Rock, IL
Hour by hour · 24h
55°
10p
54°
11p
52°
12a
52°
1a
51°
2a
51°
3a
51°
4a
51°
5a
51°
6a
54°
7a
55°
29%
8a
54°
43%
9a
56°
36%
10a
60°
22%
11a
64°
12p
67°
1p
72°
2p
75°
3p
78°
4p
78°
5p
78°
6p
76°
7p
72°
8p
70°
9p
Flat Rock, IL
7-day forecast
- TodayMay 16Light Rain82%76°64°
- SundayMay 17Mostly Clear—85°63°
- MondayMay 18Light Showers59%83°66°
- TuesdayMay 19Showers85%79°64°
- WednesdayMay 20Drizzle85%70°54°
- ThursdayMay 21Drizzle14%64°50°
- FridayMay 22Drizzle31%70°54°
Flat Rock, IL
Next 24 hours · Cool now
Flat Rock, IL
Anemometer · 24h winds · from true
From · True
SE
125° · backing 43°
Direction
SE
125°
Sustained
5
mph
Gust
11
mph
Peak 24h
21
avg 7
Beaufort · 2 · LIGHT BRZ
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
Flat Rock, IL
Air quality
42
AQI
Good
- PM 2.5
- 3.9 μg/m³
- PM 10
- 4.5 μg/m³
- NO₂
- 6.8 μg/m³
- Ozone
- 68.0 μg/m³
- UV Index
- 0.0 Low
Flat Rock, IL
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:08 AM
Sunrise
5:36 AM
Daylight
14h 21m
Sunset
7:57 PM
Civil dusk
1:28 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Flat Rock, IL
The moon
New Moon
0% illuminated
- Moonrise
- 10:44 AM
- Moonset
- 1:25 AM
- In sign
- ♊︎ Gemini
Flat Rock, IL
Microseason · 28 of 72
May 16–20
Roses open on the Piedmont edge
insect
Flat Rock at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: April 9 (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.