DeKalb weather in February

In February, DeKalb sees average daytime highs of 34°F and overnight lows near 19°F, with 1.8 in of precipitation across 6.9 wet days and about 10.3 hours of daylight. It is the 11th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 30°F in the first days to 38°F by the end. The sky is clear or mostly clear about 25% of the time in February, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of February to 10 h 54 min by month's end. Set against the rest of the year, February is DeKalb's 10th-clearest and 5th-windiest month. For the whole year in context, see DeKalb's year-round climate.

Daytime high: 34°; 11th warmest
Overnight low: 19°; 2nd coldest
Precipitation: 1.8 in; 6.9 wet days
Daylight: 10 h 18 min; 7:00 AM – 5:19 PM
Cloud cover: 67%; 10th clearest
Wind: 9 mph; 5th windiest
Solar energy: 3.01 kWh/m²
Travel score: 0.0; out of 10

DeKalb is city in De Kalb County, Illinois, United States.

Density: 1,080/km²; people per km²
Founded: 1837

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

← January DeKalb year-round climate March →Best places to visit in February

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in February

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 30°F in the first days to 38°F by the end.

A typical February day in DeKalb reaches about 34°F in the afternoon and slips back to 19°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 18°F and 48°F. Set against its neighbours, February runs about 4°F warmer than January and about 13°F cooler than March.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Avg high (°F)	29	30	30	30	30	31	31	31	31	32	32	32	33	33	34	34	34	35	35	36	36	36	37	37	37	38	38	38
Avg low (°F)	15	16	16	16	16	16	17	17	17	17	17	18	18	18	19	19	20	20	20	20	21	21	22	22	22	22	23	23

	Avg high (°F)	Avg low (°F)
1	29	15
2	30	16
3	30	16
4	30	16
5	30	16
6	31	16
7	31	17
8	31	17
9	31	17
10	32	17
11	32	17
12	32	18
13	33	18
14	33	18
15	34	19
16	34	19
17	34	20
18	35	20
19	35	20
20	36	20
21	36	21
22	36	21
23	37	22
24	37	22
25	37	22
26	38	22
27	38	23
28	38	23

How February really feels in DeKalb

Once humidity and wind are folded in, February averages 0 days that feel above 90°F and 28 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

28 feel bitter (≤ 14°F)

The story in February is cold — wind chill drags the overnight "feels like" below the raw low.

DeKalb weather by month

How February compares with the rest of the year at a glance. February is the 11th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	29° / 16°	2.0	7.6	5.7	9.3	0.0
Feb	34° / 19°	1.8	6.9	4.9	10.3	0.0
Mar	46° / 29°	2.6	9.3	2.9	11.7	1.3
Apr	59° / 40°	4.4	12	0.9	13.1	4.1
May	69° / 50°	4.8	12.8	0	14.3	5.9
Jun	78° / 60°	4.2	12.2	0	15	6.3
Jul	82° / 64°	3.5	10.7	0	14.7	6.4
Aug	80° / 62°	3.5	10.4	0	13.7	6.6
Sep	74° / 54°	3.2	8.7	0	12.3	7.0
Oct	61° / 43°	3.1	9.1	0.1	10.9	5.2
Nov	47° / 32°	2.4	7.7	1.6	9.6	1.5
Dec	35° / 22°	2.2	7.8	4.5	9	0.0

Cloud cover in February

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in February.

Beyond those clear spells, partly cloudy skies cover about 10% of February, with mostly cloudy or overcast conditions the remaining 65%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Clearer (%)	31	31	31	33	34	34	34	35	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36
Cloudier (%)	69	69	69	67	66	66	66	65	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	33	67
5	34	66
6	34	66
7	34	66
8	35	65
9	36	64
10	36	64
11	36	64
12	36	64
13	36	64
14	36	64
15	36	64
16	36	64
17	36	64
18	36	64
19	36	64
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	36	64

Chance of precipitation in February

Any precipitationSnow

DeKalb gets around 1.8 in of rain and snow over 6.9 wet days in February, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 25% and peaks near 29% on the wettest days, and about 5 days bring snow. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Rain chance (%)	22	22	22	22	22	22	22	22	22	22	23	23	23	24	24	25	25	26	26	27	27	28	28	28	29	29	29	29
Snow chance (%)	19	19	19	19	19	18	18	18	18	18	18	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	16	16

	Rain chance (%)	Snow chance (%)
1	22	19
2	22	19
3	22	19
4	22	19
5	22	19
6	22	18
7	22	18
8	22	18
9	22	18
10	22	18
11	23	18
12	23	17
13	23	17
14	24	17
15	24	17
16	25	17
17	25	17
18	26	17
19	26	17
20	27	17
21	27	17
22	28	17
23	28	17
24	28	17
25	29	17
26	29	17
27	29	16
28	29	16

Humidity in February

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, February lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100

Wind in February

Winds average 9 mph in February.

Across February, 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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Wind speed (mph)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	9	light breeze
2	9	light breeze
3	9	light breeze
4	9	light breeze
5	9	light breeze
6	9	light breeze
7	9	light breeze
8	9	light breeze
9	9	light breeze
10	9	light breeze
11	9	light breeze
12	9	light breeze
13	9	light breeze
14	9	light breeze
15	9	light breeze
16	9	light breeze
17	9	light breeze
18	9	light breeze
19	9	light breeze
20	9	light breeze
21	9	light breeze
22	9	light breeze
23	9	light breeze
24	9	light breeze
25	9	light breeze
26	9	light breeze
27	9	light breeze
28	9	light breeze

Sunrise & sunset in February

DaylightNight

Daylight runs from about 9 h 48 min at the start of February to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over February. Sunrise moves from 7:16 AM to 6:42 AM, and sunset from 5:01 PM to 5:35 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Daylight (h)	9.8	9.8	9.8	9.9	9.9	9.9	10.0	10.0	10.1	10.1	10.1	10.2	10.2	10.3	10.3	10.4	10.4	10.4	10.5	10.5	10.6	10.6	10.7	10.7	10.8	10.8	10.8	10.9
Sunrise (AM)	7:16	7:15	7:14	7:13	7:12	7:11	7:10	7:09	7:07	7:06	7:05	7:04	7:03	7:01	7:00	6:59	6:58	6:56	6:55	6:53	6:52	6:51	6:49	6:48	6:46	6:45	6:43	6:42
Sunset (PM)	5:01	5:03	5:04	5:05	5:06	5:08	5:09	5:10	5:11	5:13	5:14	5:15	5:16	5:18	5:19	5:20	5:22	5:23	5:24	5:25	5:27	5:28	5:29	5:30	5:32	5:33	5:34	5:35

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.8	7:16	5:01
2	9.8	7:15	5:03
3	9.8	7:14	5:04
4	9.9	7:13	5:05
5	9.9	7:12	5:06
6	9.9	7:11	5:08
7	10.0	7:10	5:09
8	10.0	7:09	5:10
9	10.1	7:07	5:11
10	10.1	7:06	5:13
11	10.1	7:05	5:14
12	10.2	7:04	5:15
13	10.2	7:03	5:16
14	10.3	7:01	5:18
15	10.3	7:00	5:19
16	10.4	6:59	5:20
17	10.4	6:58	5:22
18	10.4	6:56	5:23
19	10.5	6:55	5:24
20	10.5	6:53	5:25
21	10.6	6:52	5:27
22	10.6	6:51	5:28
23	10.7	6:49	5:29
24	10.7	6:48	5:30
25	10.8	6:46	5:32
26	10.8	6:45	5:33
27	10.8	6:43	5:34
28	10.9	6:42	5:35

Solar energy in February

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in February, about 3.01 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 6.29 kWh/m² in June across the year — February's 3.01 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Solar energy (kWh/m²)	2.5	2.6	2.6	2.6	2.7	2.7	2.8	2.8	2.8	2.9	2.9	2.9	3.0	3.0	3.0	3.1	3.1	3.1	3.1	3.2	3.2	3.3	3.3	3.3	3.4	3.4	3.5	3.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.5	Moderate
2	2.6	Moderate
3	2.6	Moderate
4	2.6	Moderate
5	2.7	Moderate
6	2.7	Moderate
7	2.8	Moderate
8	2.8	Moderate
9	2.8	Moderate
10	2.9	Moderate
11	2.9	Moderate
12	2.9	Moderate
13	3.0	Moderate
14	3.0	Moderate
15	3.0	Moderate
16	3.1	Moderate
17	3.1	Moderate
18	3.1	Moderate
19	3.1	Moderate
20	3.2	Moderate
21	3.2	Moderate
22	3.3	Moderate
23	3.3	Moderate
24	3.3	Moderate
25	3.4	Moderate
26	3.4	Moderate
27	3.5	Moderate
28	3.5	Moderate

Planning a trip in February

Is February a good time to visit DeKalb?

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

0.0

Sightseeing

10th-best month of the year

0.0

Beach & pool

9th-best month of the year

February is a weaker month for outdoor sightseeing in DeKalb.

What to pack for DeKalb in February

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

In February, DeKalb sees daytime highs around 34°F and nights near 19°F. Pack a warm layer and a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in DeKalb in February

LowModerateHighVery highExtreme

Clear-sky midday UV in February peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in DeKalb peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	4	6	8	9	8	8	6	3	2	2
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	4	Moderate
Apr	6	High
May	8	Very high
Jun	9	Very high
Jul	8	Very high
Aug	8	Very high
Sep	6	High
Oct	3	Moderate
Nov	2	Moderate
Dec	2	Low

Air quality in DeKalb in February

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in DeKalb is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	12	15	16	14	15	16	17	16	13	9	10	11
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	12	Moderate
Feb	15	Moderate
Mar	16	Moderate
Apr	14	Moderate
May	15	Moderate
Jun	16	Moderate
Jul	17	Moderate
Aug	16	Moderate
Sep	13	Moderate
Oct	9	Good
Nov	10	Good
Dec	11	Good

Location & terrain

Where is DeKalb?

DeKalb sits at 41.9°N, 88.8°W, 879 ft above sea level, in United States. The nearest listed city is Sycamore, 5.0 mi away.

Topography around DeKalb

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

Within 2 miles, the terrain around DeKalb has only modest variations in elevation — a maximum elevation change of 102 ft around an average of 883 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 308 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 850 ft.

The land around DeKalb is covered by artificial surfaces (35%), trees (23%) and grassland (23%) within 2 miles, cropland (84%) within 10 miles, and cropland (59%) within 50 miles.

2 miles

102 ft

artificial surfaces 35%

10 miles

308 ft

cropland 84%

50 miles

850 ft

cropland 59%

treesgrasslandcroplandartificial surfacesbare terrainwater

← January DeKalb year-round climate March →Best places to visit in February

February weather nearby: Sycamore 5.0 mi · Wasco 18 mi · St. Charles 23 mi · Geneva 23 mi · Batavia 23 mi · Huntley 24 mi · North Aurora 24 mi · Belvidere 24 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

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 DeKalb (41.9295°, -88.7504°, elevation 879 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).

	Avg high (°F)	Avg low (°F)
1	29	15
2	30	16
3	30	16
4	30	16
5	30	16
6	31	16
7	31	17
8	31	17
9	31	17
10	32	17
11	32	17
12	32	18
13	33	18
14	33	18
15	34	19
16	34	19
17	34	20
18	35	20
19	35	20
20	36	20
21	36	21
22	36	21
23	37	22
24	37	22
25	37	22
26	38	22
27	38	23
28	38	23

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	33	67
5	34	66
6	34	66
7	34	66
8	35	65
9	36	64
10	36	64
11	36	64
12	36	64
13	36	64
14	36	64
15	36	64
16	36	64
17	36	64
18	36	64
19	36	64
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	36	64

	Rain chance (%)	Snow chance (%)
1	22	19
2	22	19
3	22	19
4	22	19
5	22	19
6	22	18
7	22	18
8	22	18
9	22	18
10	22	18
11	23	18
12	23	17
13	23	17
14	24	17
15	24	17
16	25	17
17	25	17
18	26	17
19	26	17
20	27	17
21	27	17
22	28	17
23	28	17
24	28	17
25	29	17
26	29	17
27	29	16
28	29	16

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100

	Avg high (°F)	Avg low (°F)
1	29	15
2	30	16
3	30	16
4	30	16
5	30	16
6	31	16
7	31	17
8	31	17
9	31	17
10	32	17
11	32	17
12	32	18
13	33	18
14	33	18
15	34	19
16	34	19
17	34	20
18	35	20
19	35	20
20	36	20
21	36	21
22	36	21
23	37	22
24	37	22
25	37	22
26	38	22
27	38	23
28	38	23

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	33	67
5	34	66
6	34	66
7	34	66
8	35	65
9	36	64
10	36	64
11	36	64
12	36	64
13	36	64
14	36	64
15	36	64
16	36	64
17	36	64
18	36	64
19	36	64
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	36	64

	Rain chance (%)	Snow chance (%)
1	22	19
2	22	19
3	22	19
4	22	19
5	22	19
6	22	18
7	22	18
8	22	18
9	22	18
10	22	18
11	23	18
12	23	17
13	23	17
14	24	17
15	24	17
16	25	17
17	25	17
18	26	17
19	26	17
20	27	17
21	27	17
22	28	17
23	28	17
24	28	17
25	29	17
26	29	17
27	29	16
28	29	16

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100

	Avg high (°F)	Avg low (°F)
1	29	15
2	30	16
3	30	16
4	30	16
5	30	16
6	31	16
7	31	17
8	31	17
9	31	17
10	32	17
11	32	17
12	32	18
13	33	18
14	33	18
15	34	19
16	34	19
17	34	20
18	35	20
19	35	20
20	36	20
21	36	21
22	36	21
23	37	22
24	37	22
25	37	22
26	38	22
27	38	23
28	38	23

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	33	67
5	34	66
6	34	66
7	34	66
8	35	65
9	36	64
10	36	64
11	36	64
12	36	64
13	36	64
14	36	64
15	36	64
16	36	64
17	36	64
18	36	64
19	36	64
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	36	64

	Rain chance (%)	Snow chance (%)
1	22	19
2	22	19
3	22	19
4	22	19
5	22	19
6	22	18
7	22	18
8	22	18
9	22	18
10	22	18
11	23	18
12	23	17
13	23	17
14	24	17
15	24	17
16	25	17
17	25	17
18	26	17
19	26	17
20	27	17
21	27	17
22	28	17
23	28	17
24	28	17
25	29	17
26	29	17
27	29	16
28	29	16

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100