Meru weather in December

In December, Meru sees average daytime highs of 25°C and overnight lows near 16°C, with 55 mm of rain across 13.2 wet days and about 12 hours of daylight. It is the 10th-warmest and 3rd-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 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 Meru's 7th-clearest and 12th-windiest month. For the whole year in context, see Meru's year-round climate.

Daytime high
25°
10th warmest
Overnight low
16°
4th coldest
Rainfall
55 mm
13.2 wet days
Daylight
12 hours
6:26 AM – 6:25 PM
Cloud cover
48%
7th clearest
Wind
5 km/h
12th windiest
Solar energy
5.6 kWh/m²
Travel score
6.5
out of 10

Meru is town in Kenya.

Founded
1911

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 25°C through the month.

A typical December day in Meru reaches about 25°C in the afternoon and slips back to 16°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, December runs on par with November and about 1°C cooler than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12517
22517
32517
42517
52517
62517
72517
82517
92517
102517
112517
122516
132516
142516
152516
162516
172516
182516
192616
202616
212616
222616
232616
242616
252616
262616
272616
282616
292616
302616
312616

Meru weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 16°397.5127.2
Feb28° / 17°204.8127.1
Mar28° / 18°428.8126.5
Apr27° / 18°8413.8126.0
May26° / 18°377.3127.2
Jun25° / 17°132.8127.8
Jul25° / 16°101.8128.0
Aug25° / 16°112.2127.9
Sep27° / 17°102.1127.9
Oct27° / 18°439.2126.8
Nov25° / 17°11220.6125.3
Dec25° / 16°5513.2126.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35941
46040
56139
66238
76337
86337
96436
106535
116634
126634
136733
146832
156832
166931
176931
187030
197030
207030
217030
227030
237129
247129
257129
267129
277129
287129
297129
307129
317030

Chance of precipitation in December

Any precipitation

Meru gets around 55 mm of rain over 13.2 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 43% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
161
260
359
458
556
655
753
852
950
1049
1148
1247
1345
1444
1543
1642
1741
1839
1938
2037
2137
2236
2335
2434
2533
2633
2732
2832
2931
3031
3130

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 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1125722
2126712
3127702
4128692
5229672
6230662
7331651
8332641
9433621
10534601
11535591
12635581
13636571
14737551
15838531
16839521
17940501
18940510
191041490
201042470
211143460
221144450
231144440
241245430
251245420
261346410
271346400
281446400
291446390
301547380
311547371

Wind in December

Winds average 5 km/h in December, the calmest month.

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
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
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 6:19 AM to 6:33 AM, and sunset from 6:19 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:196:19
212.06:206:19
312.06:206:20
412.06:206:20
512.06:216:21
612.06:216:21
712.06:226:21
812.06:226:22
912.06:226:22
1012.06:236:23
1112.06:236:23
1212.06:246:24
1312.06:246:24
1412.06:256:25
1512.06:256:25
1612.06:266:25
1712.06:266:26
1812.06:276:26
1912.06:276:27
2012.06:276:27
2112.06:286:28
2212.06:286:28
2312.06:296:29
2412.06:296:29
2512.06:306:30
2612.06:306:30
2712.06:316:31
2812.06:316:31
2912.06:326:32
3012.06:326:32
3112.06:336:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.6 kWh/m².

For context, solar energy here swings from a low near 5.06 kWh/m² to a high of 6.63 kWh/m² in February across the year — December's 5.6 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.5Bright
115.5Bright
125.5Bright
135.6Bright
145.6Bright
155.6Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in December

Is December a good time to visit Meru?

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

6.5
Sightseeing
9th-best month of the year
6.0
Beach & pool
11th-best month of the year

December is a reasonable time to visit Meru for sightseeing.

What to pack for Meru in December

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

In December, Meru sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Meru in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Meru peaks around March 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 16Jun 19UV 11
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr16Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in Meru 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 Meru is worst in February — around 32 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (September, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateFeb 1832 µg/m³Sep 1819 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb32Moderate
Mar31Moderate
Apr28Moderate
May25Moderate
Jun28Moderate
Jul27Moderate
Aug21Moderate
Sep19Moderate
Oct20Moderate
Nov29Moderate
Dec32Moderate
Location & terrain

Where is Meru?

Meru sits at 0.0°N, 37.7°E, 1,579 m above sea level, in Kenya. The nearest listed city is Isiolo, 35 km away.

NanyukiEmbuKerugoyaKaratinaWanguru

Topography around Meru

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

Within 3 km, the terrain around Meru has significant variations in elevation — a maximum elevation change of 418 m around an average of 1,566 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,570 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,755 m.

The land around Meru is covered by trees (72%) within 3 km, trees (53%) and cropland (24%) within 16 km, and shrubs (39%), grassland (26%) and trees (23%) within 80 km.

3 km
418 m
16 km
1,570 m
80 km
4,755 m
treesshrubsgrasslandcroplandartificial surfaceswetland
December weather nearby: Isiolo 35 km · Maua 38 km · Chuka 42 km · Nanyuki 65 km · Embu 69 km · Kerugoya 74 km · Karatina 83 km · Wanguru 88 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 Meru (0.0463°, 37.6559°, elevation 1,579 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).