Mumias weather in December

In December, Mumias sees average daytime highs of 28°C and overnight lows near 17°C, with 137 mm of rain across 20.1 wet days and about 12 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels humid.

Daylight stretches from about 12 hours at the start of December to 12 hours by month's end. Set against the rest of the year, December is Mumias's 3rd-clearest and 4th-windiest month. For the whole year in context, see Mumias's year-round climate.

Daytime high
28°
4th warmest
Overnight low
17°
5th coldest
Rainfall
137 mm
20.1 wet days
Daylight
12 hours
6:39 AM – 6:38 PM
Cloud cover
63%
3rd clearest
Wind
6 km/h
4th windiest
Solar energy
5.96 kWh/m²
Travel score
4.7
out of 10

Mumias is city.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical December day in Mumias reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 30°C. Set against its neighbours, December runs on par with November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12817
22817
32817
42817
52817
62817
72817
82817
92817
102817
112817
122817
132817
142817
152817
162817
172817
182817
192817
202817
212817
222817
232817
242817
252817
262817
272817
282817
292817
302917
312917

Mumias weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 17°10215.8124.8
Feb30° / 18°8113.6124.5
Mar29° / 18°15821.7124.0
Apr27° / 18°25727.4123.6
May27° / 17°23728.3123.8
Jun26° / 17°14424.8124.3
Jul26° / 17°11922124.8
Aug27° / 17°13924.8124.4
Sep27° / 17°13724.8124.2
Oct27° / 17°18927.9123.7
Nov27° / 17°19725.8123.9
Dec28° / 17°13720.1124.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33367
43367
53565
63664
73862
83961
94159
104258
114555
124555
134654
144852
154852
164951
174951
185149
195149
205248
215248
225149
235248
245248
255248
265149
275149
285149
295149
305149
315050

Chance of precipitation in December

Any precipitation

Mumias gets around 137 mm of rain over 20.1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 64% and peaks near 77% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
177
276
376
475
574
673
772
871
970
1069
1168
1267
1366
1465
1564
1664
1763
1862
1962
2061
2160
2259
2358
2458
2557
2656
2755
2854
2954
3053
3152

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1327682
2328672
3328672
4328672
5428662
6428662
7428662
8527662
9527662
10627652
11627661
12727651
13827641
14827641
15927631
16927631
171027621
181027621
191027621
201127611
211127611
221128601
231128601
241129591
251130581
261131571
271131571
281132552
291133542
301133542
311133542

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 hours at the start of December to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:32 AM to 6:46 AM, and sunset from 6:31 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:326:31
212.06:336:32
312.06:336:32
412.06:346:32
512.06:346:33
612.06:346:33
712.06:356:34
812.06:356:34
912.06:366:34
1012.06:366:35
1112.06:376:35
1212.06:376:36
1312.06:376:36
1412.06:386:37
1512.06:386:37
1612.06:396:38
1712.06:396:38
1812.06:406:39
1912.06:406:39
2012.06:416:39
2112.06:416:40
2212.06:426:40
2312.06:426:41
2412.06:436:41
2512.06:436:42
2612.06:436:42
2712.06:446:43
2812.06:446:43
2912.06:456:44
3012.06:456:44
3112.06:466:45

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.96 kWh/m².

For context, solar energy here swings from a low near 5.08 kWh/m² to a high of 6.68 kWh/m² in February across the year — December's 5.96 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
146.0Bright
156.0Bright
166.0Bright
176.0Bright
186.0Bright
196.0Bright
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in December

Is December a good time to visit Mumias?

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

4.7
Sightseeing
3rd-best month of the year
5.3
Beach & pool
3rd-best month of the year

December is a reasonable time to visit Mumias for sightseeing.

What to pack for Mumias in December

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

In December, Mumias sees daytime highs around 28°C and nights near 17°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Mumias in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mumias peaks around March 16 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 16Jun 18UV 10
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct14Extreme
Nov12Extreme
Dec12Extreme

Air quality in Mumias in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Mumias is worst in June — around 78 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyJun 2177 µg/m³Apr 967 µg/m³
PM2.5 (µg/m³)Level
Jan74Unhealthy
Feb68Unhealthy
Mar67Unhealthy
Apr67Unhealthy
May69Unhealthy
Jun78Unhealthy
Jul76Unhealthy
Aug74Unhealthy
Sep71Unhealthy
Oct73Unhealthy
Nov77Unhealthy
Dec76Unhealthy
Location & terrain

Where is Mumias?

Mumias sits at 0.3°N, 34.5°E, 1,321 m above sea level, in Kenya. The nearest listed city is Lugulu, 21 km away.

Topography around Mumias

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

Within 3 km, the terrain around Mumias has only modest variations in elevation — a maximum elevation change of 102 m around an average of 1,300 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 224 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,661 m.

The land around Mumias is covered by shrubs (39%) and trees (26%) within 3 km, shrubs (41%), trees (23%) and cropland (20%) within 16 km, and shrubs (27%), trees (23%) and cropland (22%) within 80 km.

3 km
102 m
16 km
224 m
80 km
2,661 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Lugulu 21 km · Khwisero 22 km · Bungoma 27 km · Kakamega 30 km · Siaya 38 km · Mbale 38 km · Malaba 41 km · Malaba 43 km

Kenya travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type G
240 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$2,363
2025
Happiness
4.7 / 10
World Happiness, 2025
Homicide rate
4.9
per 100k, 2022
Road deaths
28.3
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
High
EF EPI 593
Religion
Christian 86%Muslim 11%other 2%none 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 Mumias (0.3347°, 34.488°, elevation 1,321 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. 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).