Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Big Rock, Illinois

Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →

Big Rock, IL
Sunday, May 17 at 5:02 AM
67
°
Overcast
Feels like
68°
Humidity
74%
Wind
5 mph
Sunrise
5:32 AM
Sunset
8:09 PM
Big Rock, IL
Hour by hour · 24h
56°
12a
56°
1a
56°
20%
2a
55°
3a
54°
4a
55°
5a
57°
12%
6a
58°
14%
7a
58°
10%
8a
60°
9a
62°
10a
65°
11a
67°
12p
70°
1p
74°
2p
75°
3p
76°
4p
76°
5p
76°
6p
74°
7p
71°
8p
70°
9p
68°
10p
67°
11p
L 54°H 76°
Big Rock, IL
7-day forecast
  1. Today
    May 17
    Overcast
    22%
    86°64°
  2. Monday
    May 18
    Rain
    67%
    81°68°
  3. Tuesday
    May 19
    Showers
    51%
    74°55°
  4. Wednesday
    May 20
    Overcast
    11%
    61°46°
  5. Thursday
    May 21
    Overcast
    65°44°
  6. Friday
    May 22
    Overcast
    11%
    60°50°
  7. Saturday
    May 23
    Overcast
    11%
    68°55°
Big Rock, IL
Anemometer · 24h winds · from true
NESW
From · True
S
186° · backing 63°
Direction
S
186°
Sustained
5
mph
Gust
14
mph
Peak 24h
23
avg 9
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
avg 9 · pk 23 @ 7:00a
−24h−18h−12h−6hnow
Light breeze backing 63° from the s.
Big Rock, IL
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
986.6
-0.5 mb in 3h · falling · 29.13 inHg
Now
986.6
mb
3h
-0.5
mb
12h
+0.9
mb
24h
+1.7
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 982988
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Big Rock, IL
Air quality
43
AQI
Good
PM 2.5
7.7 μg/m³
PM 10
8.8 μg/m³
NO₂
9.8 μg/m³
Ozone
76.0 μg/m³
UV Index
0.0 Low
Big Rock, IL
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:02 AM
Sunrise
5:32 AM
Daylight
14h 37m
Sunset
8:09 PM
Civil dusk
1:40 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Big Rock, IL
The moon
New Moon
0% illuminated
Moonrise
10:37 AM
Moonset
1:39 AM
In sign
♊︎ Gemini
Big Rock, IL
Microseason · 28 of 72
May 16–20

Roses open along the stoops

plant
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Big Rock at a glance

  • Today vs. normal: 3°F below the seasonal normal for this latitude
  • Last frost: April 27 (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.

ZIP codes in Big Rock

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.