Tejar weather in January

In January, Tejar sees average daytime highs of 25°C and overnight lows near 18°C, with 136 mm of rain across 22.8 wet days and about 11.5 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 43% of the time in January, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of January to 11 h 36 min by month's end. Set against the rest of the year, January is Tejar's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Tejar's year-round climate.

Daytime high
25°
5th warmest
Overnight low
18°
1st coldest
Rainfall
136 mm
22.8 wet days
Daylight
11 h 30 min
6:02 AM – 5:31 PM
Cloud cover
48%
2nd clearest
Wind
4 km/h
3rd windiest
Solar energy
5.07 kWh/m²
Travel score
5.1
out of 10

Tejar is human settlement in Costa Rica.

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 25°C through the month.

A typical January day in Tejar reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°C. Set against its neighbours, January runs on par with December and on par with February.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12518
22518
32518
42518
52518
62518
72518
82518
92518
102518
112518
122518
132518
142518
152518
162518
172518
182518
192518
202518
212518
222518
232518
242618
252618
262618
272618
282618
292618
302618
312618

Tejar weather by month

How January compares with the rest of the year at a glance. January is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 18°13622.811.55.1
Feb26° / 18°8118.111.75.5
Mar27° / 19°10321.111.95.1
Apr26° / 19°26327.512.23.9
May26° / 19°66030.912.43.3
Jun25° / 19°7203012.63.3
Jul25° / 19°7433112.53.3
Aug25° / 19°8143112.33.3
Sep25° / 19°7483012.13.3
Oct25° / 19°7503111.83.4
Nov25° / 19°54729.811.63.5
Dec25° / 18°27527.711.44.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 29% of January, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36634
46634
56634
66634
76733
86733
96733
106733
116733
126832
136931
146931
156931
167129
177129
187327
197327
207525
217525
227624
237723
247723
257822
267921
277921
288020
298020
308020
318119

Chance of precipitation in January

Any precipitation

Tejar gets around 136 mm of rain over 22.8 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 73% and peaks near 82% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
182
281
381
480
580
679
779
878
977
1077
1176
1275
1374
1474
1573
1672
1771
1871
1970
2070
2169
2269
2369
2469
2569
2668
2768
2867
2967
3066
3166

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the humid band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
114554
214653
314752
424850
525049
625147
725246
825444
925543
1035542
1135740
1235839
1345937
1446036
1546135
1646234
1756233
1856332
1956332
2056431
2156431
2256431
2356530
2456530
2556530
2656530
2756530
2856530
2956431
3056431
3156431

Wind in January

Winds average 4 km/h in January.

Across January, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
13calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 24 min at the start of January to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over January. Sunrise moves from 5:57 AM to 6:03 AM, and sunset from 5:23 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.45:575:23
211.45:575:24
311.45:585:24
411.45:585:25
511.45:585:25
611.55:595:26
711.55:595:26
811.55:595:27
911.56:005:27
1011.56:005:28
1111.56:005:28
1211.56:015:29
1311.56:015:29
1411.56:015:30
1511.56:015:30
1611.56:025:31
1711.56:025:31
1811.56:025:32
1911.56:025:32
2011.56:025:33
2111.56:025:33
2211.56:035:34
2311.56:035:34
2411.56:035:35
2511.56:035:35
2611.56:035:35
2711.56:035:36
2811.66:035:36
2911.66:035:37
3011.66:035:37
3111.66:035:37

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.07 kWh/m².

For context, solar energy here swings from a low near 3.78 kWh/m² to a high of 6.13 kWh/m² in March across the year — January's 5.07 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.5Bright
Planning a trip in January

Hazard calendar for Tejar

In seasonPeak

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

Tejar's rainy season runs May–November, when most of the year's rain falls.

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

Is January a good time to visit Tejar?

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

5.1
Sightseeing
2nd-best month of the year
4.7
Beach & pool
3rd-best month of the year

January is a reasonable time to visit Tejar for sightseeing.

What to pack for Tejar in January

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

In January, Tejar sees daytime highs around 25°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 23 days see rain.

rain gearlight clothessun protection

Sea temperature near Tejar in January

The nearest coast averages about 29°C 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 43 km away) is warmest in March at about 30°C and coldest in November near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov28Warm
Dec28Tropical

UV index in Tejar in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tejar peaks around March 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 16UV 14Dec 17UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov11Extreme
Dec9Very high

Air quality in Tejar 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 Tejar is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (January, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1718 µg/m³Jan 149 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr17Moderate
May19Moderate
Jun17Moderate
Jul18Moderate
Aug17Moderate
Sep16Moderate
Oct14Moderate
Nov12Good
Dec10Good
Location & terrain

Where is Tejar?

Tejar sits at 9.7°N, 84.2°W, 999 m above sea level, in Costa Rica. The nearest listed city is San Rafael Abajo, 12 km away.

San Juan de DiosSan FelipeSan Rafael ArribaSan RafaelSan MiguelPatarrá

Topography around Tejar

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tejar.

Within 3 km, the terrain around Tejar has large variations in elevation — a maximum elevation change of 1,074 m around an average of 900 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,461 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,470 m.

The land around Tejar is covered by trees (54%) and grassland (46%) within 3 km, trees (77%) and grassland (22%) within 16 km, and trees (58%) and water (27%) within 80 km.

3 km
1,074 m
16 km
2,461 m
80 km
3,470 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: San Rafael Abajo 12 km · Aserrí 20 km · San Juan de Dios 22 km · San Felipe 23 km · San Rafael Arriba 23 km · San Rafael 23 km · San Miguel 24 km · Patarrá 26 km

Costa Rica travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$19,970
2025
Happiness
7.4 / 10
World Happiness, 2025
Safe drinking water
81%
of population, 2024
Homicide rate
17.7
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 516
Religion
Roman Catholic 48%none 27%Evangelical and Pentecostal 20%other 3%

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 Tejar (9.743°, -84.2322°, elevation 999 m), 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).