Weather in St. Charles, Illinois
Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →
St. Charles, IL
Sunday, May 17 at 3:55 AM
72
°
Overcast
Feels like
71°
Humidity
65%
Wind
9 mph
Sunrise
5:31 AM
Sunset
8:07 PM
St. Charles, IL
Hour by hour · 24h
57°
10p
57°
11p
57°
12a
54°
1a
54°
13%
2a
54°
17%
3a
54°
4a
54°
5a
55°
10%
6a
58°
7a
59°
8a
59°
9a
62°
10a
63°
11a
66°
12p
69°
1p
71°
2p
73°
3p
74°
4p
75°
5p
74°
6p
72°
7p
70°
8p
68°
9p
St. Charles, IL
7-day forecast
- TodayMay 16Drizzle47%83°62°
- SundayMay 17Light Rain29%85°64°
- MondayMay 18Heavy Rain66%80°69°
- TuesdayMay 19Showers51%74°54°
- WednesdayMay 20Overcast10%60°45°
- ThursdayMay 21Overcast—64°43°
- FridayMay 22Overcast11%60°50°
St. Charles, IL
Next 24 hours · Cool now
St. Charles, IL
Anemometer · 24h winds · from true
From · True
SSW
198° · backing 44°
Direction
SSW
198°
Sustained
9
mph
Gust
19
mph
Peak 24h
21
avg 8
Beaufort · 3 · GENTLE 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
St. Charles, IL
Air quality
57
AQI
Moderate
- PM 2.5
- 4.3 μg/m³
- PM 10
- 5.2 μg/m³
- NO₂
- 7.0 μg/m³
- Ozone
- 86.0 μg/m³
- UV Index
- 0.0 Low
St. Charles, IL
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:01 AM
Sunrise
5:31 AM
Daylight
14h 36m
Sunset
8:07 PM
Civil dusk
1:40 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
St. Charles, IL
The moon
New Moon
0% illuminated
- Moonrise
- 10:35 AM
- Moonset
- 1:39 AM
- In sign
- ♊︎ Gemini
St. Charles, IL
Microseason · 28 of 72
May 16–20
Roses open along the stoops
plant
St. Charles at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 28 (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.