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

Weather in Belvidere, Illinois

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

Belvidere, IL
Sunday, May 17 at 5:07 AM
70
°
Overcast
Feels like
71°
Humidity
80%
Wind
7 mph
Sunrise
5:32 AM
Sunset
8:11 PM
Belvidere, IL
Hour by hour · 24h
57°
12a
56°
1a
54°
25%
2a
54°
3a
53°
4a
53°
5a
54°
6a
57°
7a
59°
8a
62°
9a
64°
10a
67°
11a
70°
12p
72°
1p
75°
2p
77°
3p
80°
4p
79°
5p
78°
6p
76°
7p
73°
8p
71°
9p
69°
10p
69°
11p
L 53°H 80°
Belvidere, IL
7-day forecast
  1. Today
    May 17
    Showers
    43%
    86°65°
  2. Monday
    May 18
    Showers
    71%
    79°65°
  3. Tuesday
    May 19
    Showers
    60%
    73°52°
  4. Wednesday
    May 20
    Overcast
    60°44°
  5. Thursday
    May 21
    Overcast
    63°40°
  6. Friday
    May 22
    Overcast
    12%
    67°48°
  7. Saturday
    May 23
    Overcast
    12%
    69°55°
Belvidere, IL
Anemometer · 24h winds · from true
NESW
From · True
S
178° · backing 50°
Direction
S
178°
Sustained
7
mph
Gust
14
mph
Peak 24h
26
avg 8
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 8 · pk 26 @ 6:00a
−24h−18h−12h−6hnow
Light breeze backing 50° from the s.
Belvidere, IL
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
984.0
-0.8 mb in 3h · falling · 29.06 inHg
Now
984.0
mb
3h
-0.8
mb
12h
+0.3
mb
24h
+2.8
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 981985
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Belvidere, IL
Air quality
47
AQI
Good
PM 2.5
5.3 μg/m³
PM 10
6.3 μg/m³
NO₂
14.8 μg/m³
Ozone
63.0 μg/m³
UV Index
0.0 Low
Belvidere, 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 39m
Sunset
8:11 PM
Civil dusk
1:43 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Belvidere, IL
The moon
New Moon
0% illuminated
Moonrise
10:36 AM
Moonset
1:43 AM
In sign
♊︎ Gemini
Belvidere, 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 →

Belvidere at a glance

  • Today vs. normal: 70°F — typical for the season
  • Last frost: April 30 (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

Cool-season window is open

As of May 17, the cool-season window is open or about to open. Direct-sow peas, lettuce, spinach, radishes, and brassicas now. Hold off on warm-season crops until 1–2 weeks after the last spring frost (around May).

ZIP codes in Belvidere

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.