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

Weather in Savanna, Illinois

Roses Bloom Along the Shelter Rows. Day 59 of spring. Read this microseason across nine climate regions →

Savanna, IL
Sunday, May 17 at 1:44 AM
75
°
Overcast
Feels like
77°
Humidity
62%
Wind
6 mph
Sunrise
5:38 AM
Sunset
8:15 PM
Savanna, IL
Hour by hour · 24h
67°
8p
64°
9p
62°
10p
62°
15%
11p
58°
27%
12a
59°
14%
1a
59°
2a
59°
3a
59°
4a
60°
5a
57°
6a
56°
7a
58°
8a
62°
9a
65°
10a
68°
11a
72°
12p
75°
1p
78°
2p
81°
3p
82°
4p
82°
5p
82°
6p
80°
7p
L 56°H 82°
Savanna, IL
7-day forecast
  1. Today
    May 16
    Drizzle
    66%
    82°61°
  2. Sunday
    May 17
    Light Rain
    47%
    86°64°
  3. Monday
    May 18
    Thunderstorm
    68%
    82°70°
  4. Tuesday
    May 19
    Showers
    72%
    71°51°
  5. Wednesday
    May 20
    Overcast
    —
    60°43°
  6. Thursday
    May 21
    Overcast
    —
    65°40°
  7. Friday
    May 22
    Overcast
    —
    67°48°
Savanna, IL
Next 24 hours · Mild now
HOT 90°50°70°90°12a6a12p6pnow 67°high 82°low 56°PRECIP %
Savanna, IL
Anemometer · 24h winds · from true
NESW
From · True
NE
051° · backing 114°
Direction
NE
051°
Sustained
6
mph
Gust
8
mph
Peak 24h
18
avg 5
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 5 · pk 18 @ 5:00a
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Savanna, IL
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
980.8
-0.6 mb in 3h · rising · 28.96 inHg
Now
980.8
mb
3h
-0.6
mb
12h
-1.9
mb
24h
+2.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 978–983
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Savanna, IL
Air quality
69
AQI
Moderate
PM 2.5
2.9 μg/m³
PM 10
3.8 μg/m³
NO₂
4.4 μg/m³
Ozone
95.0 μg/m³
UV Index
0.0 Low
Savanna, IL
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:08 AM
Sunrise
5:38 AM
Daylight
14h 37m
Sunset
8:15 PM
Civil dusk
1:48 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Savanna, IL
The moon
New Moon
0% illuminated
Moonrise
10:42 AM
Moonset
1:48 AM
In sign
♉︎ Taurus
Savanna, IL
Microseason · 28 of 72
May 16–20

Roses Bloom Along the Shelter Rows

plant
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Savanna at a glance

  • Today vs. normal: 5°F above the seasonal normal for this latitude
  • Last frost: April 29 (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).

All cities in Illinois →

ZIP codes in Savanna

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.