Casselberry weather in January

In January, Casselberry sees average daytime highs of 69°F and overnight lows near 50°F, with 2.1 in of rain across 6.4 wet days and about 10.4 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 69°F through the month. The sky is clear or mostly clear about 36% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 12 min at the start of January to 10 h 36 min by month's end. Set against the rest of the year, January is Casselberry's 6th-clearest and 4th-windiest month. For the whole year in context, see Casselberry's year-round climate.

Daytime high
69°
12th warmest
Overnight low
50°
1st coldest
Rainfall
2.1 in
6.4 wet days
Daylight
10 h 24 min
7:24 AM – 5:45 PM
Cloud cover
54%
6th clearest
Wind
7 mph
4th windiest
Solar energy
3.24 kWh/m²
Travel score
7.1
out of 10

Casselberry is city in Seminole County, Florida, United States.

Density
1,383/km²
people per km²
Founded
1940

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 69°F through the month.

A typical January day in Casselberry reaches about 69°F in the afternoon and slips back to 50°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 58°F and 79°F. Set against its neighbours, January runs about 2°F cooler than December and about 3°F cooler than February.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17052
27051
37051
47051
57051
67051
76951
86951
96950
106950
116950
126950
136950
146950
156950
166950
176950
186949
196949
206949
216949
226950
236950
246950
256950
266950
276950
286950
296950
307050
317051

How January really feels in Casselberry

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
0
heat index over the day's high
Days feeling ≤ 32°F
0
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.

Casselberry weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan69° / 50°2.16.410.47.1
Feb72° / 53°2.06.6117.2
Mar76° / 57°2.36.311.87.6
Apr81° / 62°2.17.112.76.9
May86° / 68°2.89.413.45.2
Jun89° / 73°5.819.913.83.3
Jul89° / 75°5.921.913.62.9
Aug89° / 75°6.522.9132.8
Sep87° / 74°5.218.412.23.7
Oct82° / 67°2.710.511.36.1
Nov76° / 59°1.35.410.67.7
Dec71° / 53°2.05.310.27.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
34951
44951
55050
65050
75149
85149
95248
105347
115347
125446
135446
145446
155446
165446
175446
185545
195545
205446
215545
225446
235545
245446
255347
265347
275248
285149
295050
305050
315050

Chance of precipitation in January

Any precipitation

Casselberry gets around 2.1 in of rain over 6.4 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 20% and peaks near 25% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
118
218
318
418
518
618
718
818
919
1018
1118
1218
1318
1418
1518
1618
1719
1819
1920
2020
2121
2221
2322
2422
2523
2623
2724
2824
2925
3025
3125

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
153161912
253161912
354161911
454161911
554161911
655161910
756161810
85716189
95716189
105916178
116016177
126116167
136117166
146117166
156317155
166317155
176317155
186417154
196318154
206318154
216318154
226417154
236417154
246417154
256417154
266217165
276217165
286217165
296217165
306217165
316118165

Wind in January

Winds average 7 mph in January.

Across January, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 12 min at the start of January to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over January. Sunrise moves from 7:22 AM to 7:20 AM, and sunset from 5:35 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.27:225:35
210.27:235:35
310.27:235:36
410.27:235:36
510.27:235:37
610.27:235:38
710.27:245:39
810.37:245:39
910.37:245:40
1010.37:245:41
1110.37:245:41
1210.37:245:42
1310.37:245:43
1410.37:245:44
1510.37:245:45
1610.47:245:45
1710.47:245:46
1810.47:245:47
1910.47:235:48
2010.47:235:49
2110.47:235:49
2210.57:235:50
2310.57:235:51
2410.57:225:52
2510.57:225:53
2610.57:225:53
2710.57:215:54
2810.67:215:55
2910.67:215:56
3010.67:205:57
3110.67:205:57

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.24 kWh/m².

For context, solar energy here swings from a low near 2.92 kWh/m² to a high of 6.19 kWh/m² in May across the year — January's 3.24 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
33.0Moderate
43.0Moderate
53.0Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.2Moderate
113.2Moderate
123.2Moderate
133.2Moderate
143.2Moderate
153.3Moderate
163.3Moderate
173.3Moderate
183.3Moderate
193.3Moderate
203.3Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.4Moderate
293.4Moderate
303.5Moderate
313.5Moderate
Planning a trip in January

Hazard calendar for Casselberry

In seasonPeak

None of Casselberry's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Casselberry sits in the Atlantic hurricane belt; the season peaks August–October.

Casselberry's rainy season runs June–September, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Casselberry?

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

7.1
Sightseeing
5th-best month of the year
4.2
Beach & pool
12th-best month of the year

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

What to pack for Casselberry in January

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

In January, Casselberry sees daytime highs around 69°F and nights near 50°F. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Casselberry in January

The nearest coast averages about 68°F in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 41 mi away) is warmest in September at about 82°F and coldest in February near 67°F.

It's comfortable for a long swim from Mar 15 to Jan 17 — about 10.2 months when the water holds above 68°F.

65°70°75°80°85°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan68Refreshing
Feb67Cool
Mar68Refreshing
Apr71Refreshing
May76Warm
Jun80Warm
Jul82Warm
Aug82Warm
Sep82Warm
Oct79Warm
Nov74Refreshing
Dec70Refreshing

UV index in Casselberry 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 Casselberry peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 15UV 11Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar8Very high
Apr8Very high
May9Very high
Jun10Extreme
Jul11Extreme
Aug10Very high
Sep9Very high
Oct7High
Nov5High
Dec4Moderate

Air quality in Casselberry 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 Casselberry is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1019 µg/m³Dec 137 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar15Moderate
Apr13Moderate
May13Moderate
Jun19Moderate
Jul19Moderate
Aug16Moderate
Sep11Good
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Casselberry?

Casselberry sits at 28.7°N, 81.3°W, 56 ft above sea level, in United States. The nearest listed city is Winter Springs, 1.9 mi away.

Topography around Casselberry

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

Within 2 miles, the terrain around Casselberry has only modest variations in elevation — a maximum elevation change of 95 ft around an average of 79 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 164 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 322 ft.

The land around Casselberry is covered by trees (48%) and artificial surfaces (38%) within 2 miles, trees (57%) and artificial surfaces (24%) within 10 miles, and trees (55%) within 50 miles.

2 miles
95 ft
10 miles
164 ft
50 miles
322 ft
treesgrasslandartificial surfaceswaterwetland
January weather nearby: Winter Springs 1.9 mi · Altamonte Springs 2.5 mi · Maitland 4.3 mi · Winter Park 5.6 mi · Lake Mary 5.6 mi · Wekiwa Springs 6.2 mi · Oviedo 7.5 mi · Sanford 9.3 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 Casselberry (28.6778°, -81.3278°, elevation 56 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).