Northbrook weather in February

In February, Northbrook sees average daytime highs of 31°F and overnight lows near 21°F, with 2.4 in of precipitation across 7.7 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 29°F in the first days to 33°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 42 min at the start of February to 10 h 54 min by month's end. Set against the rest of the year, February is Northbrook's 10th-clearest and 6th-windiest month. For the whole year in context, see Northbrook's year-round climate.

Daytime high: 31°; 11th warmest
Overnight low: 21°; 2nd coldest
Precipitation: 2.4 in; 7.7 wet days
Daylight: 10 h 18 min; 6:57 AM – 5:15 PM
Cloud cover: 67%; 10th clearest
Wind: 13 mph; 6th windiest
Solar energy: 2.97 kWh/m²
Travel score: 0.0; out of 10

Northbrook is village in Illinois, United States.

Density: 977/km²; people per km²
Founded: 1901

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

← January Northbrook 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 29°F in the first days to 33°F by the end.

A typical February day in Northbrook reaches about 31°F in the afternoon and slips back to 21°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 19°F and 41°F. Set against its neighbours, February runs on par with January and about 6°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	29	29	29	29	30	30	30	30	30	30	31	31	31	31	31	31	32	32	32	32	32	33	33	33	33	33	33
Avg low (°F)	20	20	20	20	20	20	20	20	20	20	21	21	21	21	21	22	22	22	22	22	22	23	23	23	23	23	24	24

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

How February really feels in Northbrook

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.

Northbrook 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	30° / 21°	2.9	9.8	7	9.3	0.0
Feb	31° / 21°	2.4	7.7	5.1	10.3	0.0
Mar	37° / 29°	3.0	9.8	3.2	11.6	0.0
Apr	46° / 39°	4.8	12	1.4	13.1	1.3
May	58° / 50°	4.1	11.7	0	14.4	4.1
Jun	71° / 64°	3.5	10.5	0	15	6.5
Jul	78° / 70°	3.1	10.5	0	14.8	6.8
Aug	77° / 70°	3.8	10.7	0	13.7	7.0
Sep	71° / 63°	3.3	9.5	0	12.3	6.8
Oct	58° / 51°	4.0	10.5	0.1	10.8	4.4
Nov	46° / 39°	3.4	10	1.3	9.6	1.2
Dec	36° / 28°	3.1	10	4.9	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 11% 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 (%)	33	33	33	34	35	35	35	36	36	36	36	36	36	36	36	35	35	36	35	35	35	35	35	35	35	36	36	35
Cloudier (%)	67	67	67	66	65	65	65	64	64	64	64	64	64	64	64	65	65	64	65	65	65	65	65	65	65	64	64	65

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

Chance of precipitation in February

Any precipitationSnow

Northbrook gets around 2.4 in of rain and snow over 7.7 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 27% and peaks near 32% on the wettest days, and about 5 days bring snow.

	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 (%)	27	26	26	26	26	26	26	25	25	25	25	25	26	26	26	26	27	27	28	28	29	29	30	30	30	31	31	32
Snow chance (%)	21	21	20	20	19	19	19	18	18	17	17	17	17	17	17	17	17	17	17	18	18	18	18	18	19	19	19	19

	Rain chance (%)	Snow chance (%)
1	27	21
2	26	21
3	26	20
4	26	20
5	26	19
6	26	19
7	26	19
8	25	18
9	25	18
10	25	17
11	25	17
12	25	17
13	26	17
14	26	17
15	26	17
16	26	17
17	27	17
18	27	17
19	28	17
20	28	18
21	29	18
22	29	18
23	30	18
24	30	18
25	30	19
26	31	19
27	31	19
28	32	19

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 13 mph in February.

Across February, daily wind ranges from about 13 mph on the calmest days to 13 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)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in February

DaylightNight

Daylight runs from about 9 h 42 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 72 minutes over February. Sunrise moves from 7:13 AM to 6:38 AM, and sunset from 4:57 PM to 5:31 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)	9.7	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	10.3	10.4	10.4	10.5	10.5	10.6	10.6	10.7	10.7	10.7	10.8	10.8	10.9
Sunrise (AM)	7:13	7:12	7:11	7:10	7:09	7:08	7:06	7:05	7:04	7:03	7:02	7:01	6:59	6:58	6:57	6:56	6:54	6:53	6:51	6:50	6:49	6:47	6:46	6:44	6:43	6:41	6:40	6:38
Sunset (PM)	4:57	4:58	5:00	5:01	5:02	5:03	5:05	5:06	5:07	5:09	5:10	5:11	5:12	5:14	5:15	5:16	5:18	5:19	5:20	5:21	5:23	5:24	5:25	5:26	5:28	5:29	5:30	5:31

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.7	7:13	4:57
2	9.8	7:12	4:58
3	9.8	7:11	5:00
4	9.9	7:10	5:01
5	9.9	7:09	5:02
6	9.9	7:08	5:03
7	10.0	7:06	5:05
8	10.0	7:05	5:06
9	10.1	7:04	5:07
10	10.1	7:03	5:09
11	10.1	7:02	5:10
12	10.2	7:01	5:11
13	10.2	6:59	5:12
14	10.3	6:58	5:14
15	10.3	6:57	5:15
16	10.3	6:56	5:16
17	10.4	6:54	5:18
18	10.4	6:53	5:19
19	10.5	6:51	5:20
20	10.5	6:50	5:21
21	10.6	6:49	5:23
22	10.6	6:47	5:24
23	10.7	6:46	5:25
24	10.7	6:44	5:26
25	10.7	6:43	5:28
26	10.8	6:41	5:29
27	10.8	6:40	5:30
28	10.9	6:38	5:31

Solar energy in February

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in February, about 2.97 kWh/m².

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 6.5 kWh/m² in June across the year — February's 2.97 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)	2.4	2.5	2.5	2.5	2.6	2.6	2.7	2.7	2.8	2.8	2.8	2.9	2.9	3.0	3.0	3.0	3.1	3.1	3.1	3.2	3.2	3.3	3.3	3.4	3.4	3.5	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	2.4	Moderate
2	2.5	Moderate
3	2.5	Moderate
4	2.5	Moderate
5	2.6	Moderate
6	2.6	Moderate
7	2.7	Moderate
8	2.7	Moderate
9	2.8	Moderate
10	2.8	Moderate
11	2.8	Moderate
12	2.9	Moderate
13	2.9	Moderate
14	3.0	Moderate
15	3.0	Moderate
16	3.0	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	3.4	Moderate
25	3.4	Moderate
26	3.5	Moderate
27	3.5	Moderate
28	3.5	Moderate

Planning a trip in February

Is February a good time to visit Northbrook?

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

0.0

Sightseeing

9th-best month of the year

0.0

Beach & pool

7th-best month of the year

February is a weaker month for outdoor sightseeing in Northbrook.

What to pack for Northbrook in February

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

In February, Northbrook sees daytime highs around 31°F and nights near 21°F. Pack a warm layer and a heavy coat. Worth having: a windbreaker. About 8 days see rain.

a warm layera heavy coata windbreaker

Sea temperature near Northbrook in February

The nearest coast averages about 36°F in February — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 11 mi away) is warmest in August at about 72°F and coldest in February near 36°F.

It's comfortable for a long swim from Jul 14 to Sep 14 — about 2.1 months when the water holds above 68°F.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	38	36	36	39	44	56	69	72	68	58	48	42
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Refreshing	Refreshing	Refreshing	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	38	Bracing
Feb	36	Bracing
Mar	36	Bracing
Apr	39	Bracing
May	44	Bracing
Jun	56	Bracing
Jul	69	Refreshing
Aug	72	Refreshing
Sep	68	Refreshing
Oct	58	Bracing
Nov	48	Bracing
Dec	42	Bracing

UV index in Northbrook 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 Northbrook peaks around June 23 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 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	4	6	7	9	9	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	7	Very high
Jun	9	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	3	Moderate
Nov	2	Moderate
Dec	2	Low

Air quality in Northbrook 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 Northbrook is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 10 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	18	19	20	21	21	18	15	10	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	18	Moderate
Apr	19	Moderate
May	20	Moderate
Jun	21	Moderate
Jul	21	Moderate
Aug	18	Moderate
Sep	15	Moderate
Oct	10	Good
Nov	10	Good
Dec	11	Good

Location & terrain

Where is Northbrook?

Northbrook sits at 42.1°N, 87.8°W, 646 ft above sea level, in United States. The nearest listed city is Deerfield, 3.1 mi away.

Topography around Northbrook

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

Within 2 miles, the terrain around Northbrook has only modest variations in elevation — a maximum elevation change of 135 ft around an average of 673 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 240 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 892 ft.

The land around Northbrook is covered by trees (46%) and artificial surfaces (35%) within 2 miles, trees (35%), artificial surfaces (29%) and water (25%) within 10 miles, and water (40%) within 50 miles.

2 miles

135 ft

trees 46%

10 miles

240 ft

trees 35%

50 miles

892 ft

water 40%

treesgrasslandcroplandartificial surfaceswater

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

February weather nearby: Deerfield 3.1 mi · Highland Park 3.7 mi · Glenview 4.3 mi · Wheeling 5.0 mi · Prospect Heights 6.2 mi · Morton Grove 6.2 mi · Wilmette 6.8 mi · Buffalo Grove 6.8 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 Northbrook (42.1275°, -87.829°, elevation 646 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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	20
2	29	20
3	29	20
4	29	20
5	29	20
6	30	20
7	30	20
8	30	20
9	30	20
10	30	20
11	30	21
12	31	21
13	31	21
14	31	21
15	31	21
16	31	22
17	31	22
18	32	22
19	32	22
20	32	22
21	32	22
22	32	23
23	33	23
24	33	23
25	33	23
26	33	23
27	33	24
28	33	24

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

	Rain chance (%)	Snow chance (%)
1	27	21
2	26	21
3	26	20
4	26	20
5	26	19
6	26	19
7	26	19
8	25	18
9	25	18
10	25	17
11	25	17
12	25	17
13	26	17
14	26	17
15	26	17
16	26	17
17	27	17
18	27	17
19	28	17
20	28	18
21	29	18
22	29	18
23	30	18
24	30	18
25	30	19
26	31	19
27	31	19
28	32	19

	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	20
2	29	20
3	29	20
4	29	20
5	29	20
6	30	20
7	30	20
8	30	20
9	30	20
10	30	20
11	30	21
12	31	21
13	31	21
14	31	21
15	31	21
16	31	22
17	31	22
18	32	22
19	32	22
20	32	22
21	32	22
22	32	23
23	33	23
24	33	23
25	33	23
26	33	23
27	33	24
28	33	24

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

	Rain chance (%)	Snow chance (%)
1	27	21
2	26	21
3	26	20
4	26	20
5	26	19
6	26	19
7	26	19
8	25	18
9	25	18
10	25	17
11	25	17
12	25	17
13	26	17
14	26	17
15	26	17
16	26	17
17	27	17
18	27	17
19	28	17
20	28	18
21	29	18
22	29	18
23	30	18
24	30	18
25	30	19
26	31	19
27	31	19
28	32	19

	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	20
2	29	20
3	29	20
4	29	20
5	29	20
6	30	20
7	30	20
8	30	20
9	30	20
10	30	20
11	30	21
12	31	21
13	31	21
14	31	21
15	31	21
16	31	22
17	31	22
18	32	22
19	32	22
20	32	22
21	32	22
22	32	23
23	33	23
24	33	23
25	33	23
26	33	23
27	33	24
28	33	24

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

	Rain chance (%)	Snow chance (%)
1	27	21
2	26	21
3	26	20
4	26	20
5	26	19
6	26	19
7	26	19
8	25	18
9	25	18
10	25	17
11	25	17
12	25	17
13	26	17
14	26	17
15	26	17
16	26	17
17	27	17
18	27	17
19	28	17
20	28	18
21	29	18
22	29	18
23	30	18
24	30	18
25	30	19
26	31	19
27	31	19
28	32	19

	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