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

Weather in Mazon, Illinois

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

Mazon, IL
Sunday, May 17 at 4:58 AM
66
°
Overcast
Feels like
67°
Humidity
86%
Wind
7 mph
Sunrise
5:33 AM
Sunset
8:06 PM
Mazon, IL
Hour by hour · 24h
59°
11p
58°
12a
56°
1a
55°
16%
2a
57°
16%
3a
56°
11%
4a
57°
11%
5a
59°
17%
6a
56°
38%
7a
57°
12%
8a
58°
11%
9a
60°
13%
10a
64°
11a
66°
12p
69°
1p
72°
2p
73°
3p
75°
4p
76°
5p
76°
6p
76°
7p
72°
8p
71°
9p
70°
10p
L 55°H 76°
Mazon, IL
7-day forecast
  1. Today
    May 16
    Heavy Rain
    37%
    81°62°
  2. Sunday
    May 17
    Overcast
    12%
    88°62°
  3. Monday
    May 18
    Rain
    75%
    83°68°
  4. Tuesday
    May 19
    Light Showers
    67%
    78°57°
  5. Wednesday
    May 20
    Overcast
    19%
    63°47°
  6. Thursday
    May 21
    Overcast
    65°45°
  7. Friday
    May 22
    Overcast
    12%
    57°51°
Mazon, IL
Anemometer · 24h winds · from true
NESW
From · True
S
180° · veering 90°
Direction
S
180°
Sustained
7
mph
Gust
16
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 @ 2:00p
−24h−18h−12h−6hnow
Light breeze veering 90° from the s.
Mazon, IL
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
990.5
-0.1 mb in 3h · steady · 29.25 inHg
Now
990.5
mb
3h
-0.1
mb
12h
+0.3
mb
24h
+2.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 987992
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Mazon, IL
Air quality
44
AQI
Good
PM 2.5
7.0 μg/m³
PM 10
8.5 μg/m³
NO₂
8.6 μg/m³
Ozone
71.0 μg/m³
UV Index
0.0 Low
Mazon, IL
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:04 AM
Sunrise
5:33 AM
Daylight
14h 33m
Sunset
8:06 PM
Civil dusk
1:38 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Mazon, IL
The moon
New Moon
0% illuminated
Moonrise
10:38 AM
Moonset
1:37 AM
In sign
♊︎ Gemini
Mazon, 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 →

Mazon at a glance

  • Today vs. normal: 4°F below the seasonal normal for this latitude
  • Last frost: April 23 (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 Mazon

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.