Casa Grande weather in January

In January, Casa Grande sees average daytime highs of 67°F and overnight lows near 43°F, with 1.0 in of rain across 3.5 wet days and about 10.1 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 65°F in the first days to 69°F by the end. The sky is clear or mostly clear about 59% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of January to 10 h 24 min by month's end. Set against the rest of the year, January is Casa Grande's 11th-clearest and 10th-windiest month. For the whole year in context, see Casa Grande's year-round climate.

Daytime high: 67°; 11th warmest
Overnight low: 43°; 2nd coldest
Rainfall: 1.0 in; 3.5 wet days
Daylight: 10 h 06 min; 7:35 AM – 5:38 PM
Cloud cover: 37%; 11th clearest
Wind: 4 mph; 10th windiest
Solar energy: 3.56 kWh/m²
Travel score: 7.5; out of 10

Casa Grande is city in Pinal County, Arizona, United States.

Density: 180/km²; people per km²
Founded: 1879

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

← December Casa Grande year-round climate February →Best places to visit in January

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 65°F in the first days to 69°F by the end.

A typical January day in Casa Grande reaches about 67°F in the afternoon and slips back to 43°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 58°F and 76°F. Set against its neighbours, January runs on par with December and about 4°F cooler than February.

	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	29	30	31
Avg high (°F)	65	65	65	65	65	66	66	66	66	66	67	67	67	67	67	67	67	67	67	67	68	68	68	68	68	68	68	68	69	69	69
Avg low (°F)	42	42	42	42	43	43	43	43	43	43	43	43	43	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44

	Avg high (°F)	Avg low (°F)
1	65	42
2	65	42
3	65	42
4	65	42
5	65	43
6	66	43
7	66	43
8	66	43
9	66	43
10	66	43
11	67	43
12	67	43
13	67	43
14	67	43
15	67	43
16	67	43
17	67	44
18	67	44
19	67	44
20	67	44
21	68	44
22	68	44
23	68	44
24	68	44
25	68	44
26	68	44
27	68	44
28	68	44
29	69	44
30	69	44
31	69	44

How January really feels in Casa Grande

Once humidity and wind are folded in, January 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

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

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

Casa Grande weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	67° / 43°	1.0	3.5	10.1	7.5
Feb	71° / 47°	1.1	3.7	10.8	7.8
Mar	78° / 52°	0.7	2.7	11.8	8.3
Apr	85° / 57°	0.2	1.1	12.8	6.8
May	94° / 65°	0.1	0.6	13.7	3.5
Jun	104° / 74°	0.1	0.5	14.1	0.4
Jul	105° / 81°	0.8	3.9	13.9	0.0
Aug	103° / 81°	1.1	4.3	13.2	0.2
Sep	99° / 74°	0.9	3.1	12.2	1.8
Oct	89° / 63°	0.5	2.1	11.2	5.5
Nov	76° / 51°	0.5	1.8	10.3	8.6
Dec	66° / 43°	0.9	3.6	9.9	7.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 29%.

	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	29	30	31
Clearer (%)	68	68	68	68	69	69	69	69	69	71	71	70	71	71	71	71	71	72	72	72	72	72	72	72	72	72	73	73	73	73	73
Cloudier (%)	32	32	32	32	31	31	31	31	31	29	29	30	29	29	29	29	29	28	28	28	28	28	28	28	28	28	27	27	27	27	27

	Clearer (%)	Cloudier (%)
1	68	32
2	68	32
3	68	32
4	68	32
5	69	31
6	69	31
7	69	31
8	69	31
9	69	31
10	71	29
11	71	29
12	70	30
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	72	28
19	72	28
20	72	28
21	72	28
22	72	28
23	72	28
24	72	28
25	72	28
26	72	28
27	73	27
28	73	27
29	73	27
30	73	27
31	73	27

Chance of precipitation in January

Any precipitation

Casa Grande gets around 1.0 in of rain over 3.5 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 11% and peaks near 13% on the wettest days.

	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	29	30	31
Rain chance (%)	13	13	13	13	13	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10

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

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	100	100
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	100	0
31	100	0

Wind in January

Winds average 4 mph in January.

Across January, daily wind ranges from about 4 mph on the calmest days to 5 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	29	30	31
Wind speed (mph)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (mph)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	5	calm
30	5	calm
31	5	calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 54 min at the start of January to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 7:34 AM to 7:29 AM, and sunset from 5:26 PM to 5:52 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	29	30	31
Daylight (h)	9.9	9.9	9.9	9.9	9.9	9.9	9.9	9.9	9.9	10.0	10.0	10.0	10.0	10.0	10.0	10.1	10.1	10.1	10.1	10.1	10.1	10.2	10.2	10.2	10.2	10.3	10.3	10.3	10.3	10.3	10.4
Sunrise (AM)	7:34	7:34	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:35	7:34	7:34	7:34	7:34	7:33	7:33	7:32	7:32	7:32	7:31	7:31	7:30	7:30	7:29
Sunset (PM)	5:26	5:27	5:28	5:28	5:29	5:30	5:31	5:31	5:32	5:33	5:34	5:35	5:35	5:36	5:37	5:38	5:39	5:40	5:41	5:41	5:42	5:43	5:44	5:45	5:46	5:47	5:48	5:49	5:50	5:51	5:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.9	7:34	5:26
2	9.9	7:34	5:27
3	9.9	7:35	5:28
4	9.9	7:35	5:28
5	9.9	7:35	5:29
6	9.9	7:35	5:30
7	9.9	7:35	5:31
8	9.9	7:35	5:31
9	9.9	7:35	5:32
10	10.0	7:35	5:33
11	10.0	7:35	5:34
12	10.0	7:35	5:35
13	10.0	7:35	5:35
14	10.0	7:35	5:36
15	10.0	7:35	5:37
16	10.1	7:35	5:38
17	10.1	7:35	5:39
18	10.1	7:34	5:40
19	10.1	7:34	5:41
20	10.1	7:34	5:41
21	10.1	7:34	5:42
22	10.2	7:33	5:43
23	10.2	7:33	5:44
24	10.2	7:32	5:45
25	10.2	7:32	5:46
26	10.3	7:32	5:47
27	10.3	7:31	5:48
28	10.3	7:31	5:49
29	10.3	7:30	5:50
30	10.3	7:30	5:51
31	10.4	7:29	5:52

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.56 kWh/m².

For context, solar energy here swings from a low near 3.25 kWh/m² to a high of 8.47 kWh/m² in June across the year — January's 3.56 kWh/m² sits near the bottom.

	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	29	30	31
Solar energy (kWh/m²)	3.3	3.3	3.3	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.5	3.5	3.5	3.5	3.6	3.6	3.6	3.6	3.7	3.7	3.7	3.8	3.8	3.8	3.9	3.9	3.9	4.0	4.0	4.0
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	Moderate	Moderate	Bright

	Solar energy (kWh/m²)	Level
1	3.3	Moderate
2	3.3	Moderate
3	3.3	Moderate
4	3.4	Moderate
5	3.4	Moderate
6	3.4	Moderate
7	3.4	Moderate
8	3.4	Moderate
9	3.4	Moderate
10	3.4	Moderate
11	3.4	Moderate
12	3.5	Moderate
13	3.5	Moderate
14	3.5	Moderate
15	3.5	Moderate
16	3.6	Moderate
17	3.6	Moderate
18	3.6	Moderate
19	3.6	Moderate
20	3.7	Moderate
21	3.7	Moderate
22	3.7	Moderate
23	3.8	Moderate
24	3.8	Moderate
25	3.8	Moderate
26	3.9	Moderate
27	3.9	Moderate
28	3.9	Moderate
29	4.0	Moderate
30	4.0	Moderate
31	4.0	Bright

Planning a trip in January

Is January a good time to visit Casa Grande?

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

7.5

Sightseeing

4th-best month of the year

3.6

Beach & pool

8th-best month of the year

January is one of the better times to visit Casa Grande for general sightseeing.

What to pack for Casa Grande in January

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

In January, Casa Grande sees daytime highs around 67°F and nights near 43°F. Worth packing: a warm layer. About 4 days see rain.

a warm layer

UV index in Casa Grande in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Casa Grande peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	4	5	5	8	9	11	11	11	9	7	5	3
Level	Moderate	Moderate	Moderate	Very high	Very high	Extreme	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	4	Moderate
Feb	5	Moderate
Mar	5	Moderate
Apr	8	Very high
May	9	Very high
Jun	11	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	9	Very high
Oct	7	High
Nov	5	Moderate
Dec	3	Moderate

Air quality in Casa Grande in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Casa Grande is worst in June — around 28 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 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)	13	13	14	14	14	28	14	13	13	12	13	13
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	13	Moderate
Mar	14	Moderate
Apr	14	Moderate
May	14	Moderate
Jun	28	Moderate
Jul	14	Moderate
Aug	13	Moderate
Sep	13	Moderate
Oct	12	Moderate
Nov	13	Moderate
Dec	13	Moderate

Location & terrain

Where is Casa Grande?

Casa Grande sits at 32.9°N, 111.8°W, 1,398 ft above sea level, in United States. The nearest listed city is Eloy, 14 mi away.

Topography around Casa Grande

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

Within 2 miles, the terrain around Casa Grande has only modest variations in elevation — a maximum elevation change of 102 ft around an average of 1,398 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,182 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,928 ft.

The land around Casa Grande is covered by bare terrain (44%) and artificial surfaces (38%) within 2 miles, bare terrain (43%) and shrubs (25%) within 10 miles, and shrubs (59%) and bare terrain (20%) within 50 miles.

2 miles

102 ft

bare terrain 44%

10 miles

2,182 ft

bare terrain 43%

50 miles

4,928 ft

shrubs 59%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← December Casa Grande year-round climate February →Best places to visit in January

January weather nearby: Eloy 14 mi · Maricopa 21 mi · Florence 24 mi · San Tan Valley 25 mi · Queen Creek 27 mi · Chandler 30 mi · Gilbert 33 mi · Ahwatukee Foothills 35 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 Casa Grande (32.8795°, -111.7574°, elevation 1,398 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	65	42
2	65	42
3	65	42
4	65	42
5	65	43
6	66	43
7	66	43
8	66	43
9	66	43
10	66	43
11	67	43
12	67	43
13	67	43
14	67	43
15	67	43
16	67	43
17	67	44
18	67	44
19	67	44
20	67	44
21	68	44
22	68	44
23	68	44
24	68	44
25	68	44
26	68	44
27	68	44
28	68	44
29	69	44
30	69	44
31	69	44

	Clearer (%)	Cloudier (%)
1	68	32
2	68	32
3	68	32
4	68	32
5	69	31
6	69	31
7	69	31
8	69	31
9	69	31
10	71	29
11	71	29
12	70	30
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	72	28
19	72	28
20	72	28
21	72	28
22	72	28
23	72	28
24	72	28
25	72	28
26	72	28
27	73	27
28	73	27
29	73	27
30	73	27
31	73	27

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

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	100	0
31	100	0

	Avg high (°F)	Avg low (°F)
1	65	42
2	65	42
3	65	42
4	65	42
5	65	43
6	66	43
7	66	43
8	66	43
9	66	43
10	66	43
11	67	43
12	67	43
13	67	43
14	67	43
15	67	43
16	67	43
17	67	44
18	67	44
19	67	44
20	67	44
21	68	44
22	68	44
23	68	44
24	68	44
25	68	44
26	68	44
27	68	44
28	68	44
29	69	44
30	69	44
31	69	44

	Clearer (%)	Cloudier (%)
1	68	32
2	68	32
3	68	32
4	68	32
5	69	31
6	69	31
7	69	31
8	69	31
9	69	31
10	71	29
11	71	29
12	70	30
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	72	28
19	72	28
20	72	28
21	72	28
22	72	28
23	72	28
24	72	28
25	72	28
26	72	28
27	73	27
28	73	27
29	73	27
30	73	27
31	73	27

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

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	100	0
31	100	0

	Avg high (°F)	Avg low (°F)
1	65	42
2	65	42
3	65	42
4	65	42
5	65	43
6	66	43
7	66	43
8	66	43
9	66	43
10	66	43
11	67	43
12	67	43
13	67	43
14	67	43
15	67	43
16	67	43
17	67	44
18	67	44
19	67	44
20	67	44
21	68	44
22	68	44
23	68	44
24	68	44
25	68	44
26	68	44
27	68	44
28	68	44
29	69	44
30	69	44
31	69	44

	Clearer (%)	Cloudier (%)
1	68	32
2	68	32
3	68	32
4	68	32
5	69	31
6	69	31
7	69	31
8	69	31
9	69	31
10	71	29
11	71	29
12	70	30
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	72	28
19	72	28
20	72	28
21	72	28
22	72	28
23	72	28
24	72	28
25	72	28
26	72	28
27	73	27
28	73	27
29	73	27
30	73	27
31	73	27

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

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	100	0
31	100	0