Reforma weather in January

In January, Reforma sees average daytime highs of 27°C and overnight lows near 19°C, with 115 mm of rain across 11.4 wet days and about 11 hours of daylight. It is the 12th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 33% of the time in January, and the air most often feels muggy.

Daylight stretches from about 10 h 54 min at the start of January to 11 h 12 min by month's end. Set against the rest of the year, January is Reforma's 6th-clearest and 2nd-windiest month. For the whole year in context, see Reforma's year-round climate.

Daytime high
27°
12th warmest
Overnight low
19°
1st coldest
Rainfall
115 mm
11.4 wet days
Daylight
11 hours
6:51 AM – 5:53 PM
Cloud cover
56%
6th clearest
Wind
8 km/h
2nd windiest
Solar energy
3.69 kWh/m²
Travel score
6.4
out of 10

Reforma is municipal seat of Reforma, State of Chiapas, Mexico.

Founded
1883

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 27°C through the month.

A typical January day in Reforma reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, January runs on par with December and about 2°C cooler than February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92719
102719
112719
122719
132719
142719
152719
162719
172719
182719
192719
202719
212719
222719
232719
242719
252719
262719
272719
282719
292719
302719
312719

How January really feels in Reforma

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

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

Reforma weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°11511.4116.4
Feb28° / 20°788.811.46.1
Mar31° / 21°486.611.95.1
Apr34° / 23°516.612.43.6
May34° / 25°8210.512.82.8
Jun34° / 25°18119.3132.4
Jul34° / 25°11816.2132.6
Aug33° / 24°18721.912.62.4
Sep32° / 24°24924.812.12.6
Oct30° / 23°23420.211.63.7
Nov29° / 21°15414.711.25.1
Dec27° / 20°10611.610.96.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 19% of January, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44951
55050
64951
74951
85050
95149
105248
115248
125248
135446
145446
155446
165446
175446
185446
195446
205347
215347
225347
235347
245347
255347
265347
275347
285347
295347
305446
315446

Chance of precipitation in January

Any precipitation

Reforma gets around 115 mm of rain over 11.4 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 37% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
340
440
540
640
740
839
939
1038
1137
1237
1336
1436
1535
1635
1735
1835
1935
2034
2134
2234
2334
2434
2534
2635
2735
2836
2936
3037
3137

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12154834
23164834
33164833
43164833
53164833
63174732
74174732
84184731
94194730
105194630
115204629
125214628
135214628
145214627
155214627
165214627
175224727
185224726
195224726
205224726
215224826
224224826
234214926
244215026
253205126
263195226
273195127
283185227
292185327
302185228
312175328

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 54 min at the start of January to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:47 AM to 6:50 AM, and sunset from 5:44 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.96:475:44
211.06:485:45
311.06:485:45
411.06:485:46
511.06:495:46
611.06:495:47
711.06:495:48
811.06:495:48
911.06:505:49
1011.06:505:49
1111.06:505:50
1211.06:505:51
1311.06:505:51
1411.06:515:52
1511.06:515:52
1611.06:515:53
1711.06:515:54
1811.16:515:54
1911.16:515:55
2011.16:515:55
2111.16:515:56
2211.16:515:57
2311.16:515:57
2411.16:515:58
2511.16:515:58
2611.16:515:59
2711.16:516:00
2811.26:516:00
2911.26:506:01
3011.26:506:01
3111.26:506:02

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.69 kWh/m².

For context, solar energy here swings from a low near 3.58 kWh/m² to a high of 6.38 kWh/m² in April across the year — January's 3.69 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.6Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
314.0Moderate
Planning a trip in January

Hazard calendar for Reforma

In seasonPeak

In January, Reforma sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

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

Reforma's rainy season runs January–January, 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 Reforma?

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

6.4
Sightseeing
1st-best month of the year
6.4
Beach & pool
5th-best month of the year

January is a reasonable time to visit Reforma for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Reforma in January

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

In January, Reforma sees daytime highs around 27°C and nights near 19°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

UV index in Reforma in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Reforma peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highExtremeVery highJun 20UV 12Jan 10UV 7
UV index (midday)Level
Jan7High
Feb10Extreme
Mar12Extreme
Apr13Extreme
May7Very high
Jun13Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Reforma 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 Reforma is worst in May — around 77 µg/m³ PM2.5 (unhealthy), about 2.4× the cleanest month (January, 32 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorMay 1375 µg/m³Jan 1633 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb37Poor
Mar46Poor
Apr69Unhealthy
May77Unhealthy
Jun52Poor
Jul45Poor
Aug40Poor
Sep41Poor
Oct38Poor
Nov36Poor
Dec37Poor
Location & terrain

Where is Reforma?

Reforma sits at 17.9°N, 93.2°W, 27 m above sea level, in Mexico. The nearest listed city is Cunduacán, 23 km away.

Topography around Reforma

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

Within 3 km, the terrain around Reforma has only modest variations in elevation — a maximum elevation change of 40 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 81 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,423 m.

The land around Reforma is covered by grassland (59%) and trees (23%) within 3 km, grassland (71%) and trees (24%) within 16 km, and grassland (44%) and trees (33%) within 80 km.

3 km
40 m
16 km
81 m
80 km
2,423 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
January weather nearby: Cunduacán 23 km · Playas del Rosario 23 km · Huimanguillo 25 km · Villahermosa 27 km · Río de Teapa 28 km · Cárdenas 28 km · Taxco 35 km · Jalpa de Méndez 37 km

Mexico travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 / 127 V · 60 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$13,889
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
12.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 440
Religion
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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 Reforma (17.859°, -93.1538°, elevation 27 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).