Jacksonville weather in April

In April, Jacksonville sees average daytime highs of 64°F and overnight lows near 45°F, with 4.6 in of precipitation across 11.5 wet days and about 13 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 60°F in the first days to 68°F by the end. The sky is clear or mostly clear about 28% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 36 min by month's end. Set against the rest of the year, April is Jacksonville's 7th-clearest and 1st-windiest month. For the whole year in context, see Jacksonville's year-round climate.

Daytime high
64°
7th warmest
Overnight low
45°
6th coldest
Precipitation
4.6 in
11.5 wet days
Daylight
13 hours
5:30 AM – 6:32 PM
Cloud cover
62%
7th clearest
Wind
9 mph
1st windiest
Solar energy
5.09 kWh/m²
Travel score
5.4
out of 10

Jacksonville is city in Morgan County, Illinois, United States.

Density
691/km²
people per km²
Founded
1825

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 60°F in the first days to 68°F by the end.

A typical April day in Jacksonville reaches about 64°F in the afternoon and slips back to 45°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 50°F and 78°F. Set against its neighbours, April runs about 12°F warmer than March and about 10°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
15940
25940
36040
46041
56041
66141
76142
86242
96242
106243
116343
126344
136444
146444
156444
166445
176545
186546
196546
206546
216646
226647
236647
246747
256748
266748
276748
286849
296849
306850

How April really feels in Jacksonville

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Jacksonville weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan36° / 21°2.37.749.50.0
Feb41° / 24°2.27.23.410.40.3
Mar52° / 34°3.110.31.611.72.8
Apr64° / 45°4.611.50.4135.4
May74° / 55°4.413.4014.26.2
Jun82° / 65°4.111.1014.85.8
Jul85° / 68°3.39.5014.55.3
Aug84° / 66°3.09013.65.7
Sep78° / 58°2.97.5012.37.3
Oct66° / 46°3.08.30.110.96.3
Nov52° / 35°3.28.20.99.82.8
Dec40° / 26°2.37.42.79.20.2

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
24258
34258
44258
54456
64456
74456
84555
94654
104555
114555
124555
134555
144357
154357
164258
174258
184258
194159
204159
214060
224060
233961
243961
253961
263862
273862
283961
293961
303961

Chance of precipitation in April

Any precipitationSnow

Jacksonville gets around 4.6 in of rain and snow over 11.5 wet days in April, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 39% and peaks near 44% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1353
2353
3352
4352
5352
6352
7352
8362
9362
10362
11372
12372
13372
14381
15381
16381
17391
18391
19401
20400
21410
22420
23420
24430
25430
26430
27440
28440
29440
30440

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
192620
292620
392620
492620
592620
692620
792620
891630
990730
1090730
1190730
1290730
1389830
1488840
1588840
1688840
1788840
1888840
1987940
2087940
2187940
22861040
23861040
24851140
25851140
26831241
27821251
28811351
29791461
30781561

Wind in April

Winds average 9 mph in April, the windiest month of the year.

Across April, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over April. Sunrise moves from 5:54 AM to 5:10 AM, and sunset from 6:17 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:546:17
212.45:526:18
312.55:516:19
412.55:496:20
512.65:476:21
612.65:466:22
712.75:446:23
812.75:426:24
912.75:416:25
1012.85:396:26
1112.85:386:27
1212.95:366:28
1312.95:346:29
1413.05:336:30
1513.05:316:31
1613.05:306:32
1713.15:286:34
1813.15:276:35
1913.25:256:36
2013.25:246:37
2113.35:226:38
2213.35:216:39
2313.35:196:40
2413.45:186:41
2513.45:176:42
2613.55:156:43
2713.55:146:44
2813.55:126:45
2913.65:116:46
3013.65:106:47

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.09 kWh/m².

For context, solar energy here swings from a low near 1.84 kWh/m² to a high of 6.46 kWh/m² in June across the year — April's 5.09 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
84.9Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Is April a good time to visit Jacksonville?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.4
Sightseeing
6th-best month of the year
1.7
Beach & pool
7th-best month of the year

April is a reasonable time to visit Jacksonville for sightseeing.

What to pack for Jacksonville in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Jacksonville sees daytime highs around 64°F and nights near 45°F. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

UV index in Jacksonville in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jacksonville peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 21UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Jacksonville in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Jacksonville is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJul 1716 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar12Moderate
Apr11Good
May14Moderate
Jun14Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Jacksonville?

Jacksonville sits at 39.7°N, 90.2°W, 610 ft above sea level, in United States. The nearest listed city is Springfield, 32 mi away.

Topography around Jacksonville

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Jacksonville.

Within 2 miles, the terrain around Jacksonville has only modest variations in elevation — a maximum elevation change of 177 ft around an average of 604 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 243 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 604 ft.

The land around Jacksonville is covered by trees (32%), grassland (25%) and cropland (23%) within 2 miles, cropland (74%) within 10 miles, and cropland (65%) and trees (27%) within 50 miles.

2 miles
177 ft
10 miles
243 ft
50 miles
604 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Springfield 32 mi · Godfrey 54 mi · Macomb 55 mi · Upper Alton 57 mi · Alton 58 mi · Hannibal 60 mi · Old Jamestown 62 mi · Quincy 64 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Jacksonville (39.7339°, -90.229°, elevation 610 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).