Mahanje weather in December

In December, Mahanje sees average daytime highs of 29°C and overnight lows near 20°C, with 182 mm of rain across 18.9 wet days and about 12.6 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels muggy.

Daylight stretches from about 12 h 30 min at the start of December to 12 h 36 min by month's end. Set against the rest of the year, December is Mahanje's 9th-clearest and 5th-windiest month. For the whole year in context, see Mahanje's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
20°
12th coldest
Rainfall
182 mm
18.9 wet days
Daylight
12 h 36 min
6:18 AM – 6:52 PM
Cloud cover
69%
9th clearest
Wind
6 km/h
5th windiest
Solar energy
5.84 kWh/m²
Travel score
4.2
out of 10
Density
19/km²
people per km²

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 29°C through the month.

A typical December day in Mahanje reaches about 29°C in the afternoon and slips back to 20°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, December runs about 1°C cooler than November and about 1°C warmer than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13020
23020
33020
43020
53020
63020
73020
83020
92920
102920
112920
122920
132920
142920
152920
162920
172920
182920
192920
202920
212920
222920
232920
242920
252920
262920
272920
282820
292820
302820
312820

Mahanje weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°28725.612.53.9
Feb28° / 19°24223.112.33.9
Mar27° / 19°22527.412.13.9
Apr26° / 18°13821.311.84.9
May25° / 16°296.811.67.4
Jun24° / 13°41.211.48.5
Jul24° / 13°4111.58.5
Aug25° / 14°41.111.78.4
Sep27° / 16°30.811.97.9
Oct30° / 18°14312.26.3
Nov31° / 20°487.212.55.1
Dec29° / 20°18218.912.64.2

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 16% of December, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24852
34852
44753
54753
64654
74555
84555
94456
104258
114258
124159
133961
143961
153862
163565
173565
183466
193367
203367
213268
223169
233169
243070
253070
262971
272971
282872
292872
302773
312674

Chance of precipitation in December

Any precipitation

Mahanje gets around 182 mm of rain over 18.9 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 61% and peaks near 76% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
145
246
347
448
549
650
751
853
954
1055
1156
1257
1358
1459
1561
1662
1763
1864
1965
2066
2167
2268
2369
2470
2571
2672
2773
2874
2975
3075
3176

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

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

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
17243633
27233535
36223537
46213439
55193441
65183443
74173345
84163347
93153349
103133351
112123254
122113255
132113156
142103058
15292960
16282862
17282763
18272665
19272566
20262468
21262369
22262270
23262171
24262072
25252073
26151975
27151876
28151777
29151777
30141679
31141679

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 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 30 min at the start of December to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:12 AM to 6:25 AM, and sunset from 6:45 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:126:45
212.56:136:45
312.56:136:46
412.56:136:46
512.66:136:47
612.66:146:47
712.66:146:48
812.66:146:48
912.66:156:49
1012.66:156:49
1112.66:156:50
1212.66:166:50
1312.66:166:51
1412.66:176:51
1512.66:176:52
1612.66:186:52
1712.66:186:53
1812.66:186:53
1912.66:196:54
2012.66:196:54
2112.66:206:55
2212.66:206:55
2312.66:216:56
2412.66:216:56
2512.66:226:56
2612.66:226:57
2712.66:236:57
2812.66:236:58
2912.66:246:58
3012.66:246:59
3112.66:256:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.84 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 6.49 kWh/m² in November across the year — December's 5.84 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Intense
66.0Bright
76.0Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for Mahanje

In seasonPeak

In December, Mahanje sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Mahanje's monsoon runs December–April, when most of the year's rain falls.

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

Is December a good time to visit Mahanje?

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

4.2
Sightseeing
9th-best month of the year
5.5
Beach & pool
8th-best month of the year

December is a reasonable time to visit Mahanje for sightseeing.

What to pack for Mahanje in December

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

In December, Mahanje sees daytime highs around 29°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

UV index in Mahanje 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 Mahanje peaks around February 22 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 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 highExtremeFeb 22UV 16Jun 17UV 10
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar16Extreme
Apr14Extreme
May10Extreme
Jun10Very high
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in Mahanje 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 Mahanje is worst in October — around 28 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (April, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 2128 µg/m³Apr 219 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar10Good
Apr9Good
May9Good
Jun9Good
Jul14Moderate
Aug18Moderate
Sep23Moderate
Oct28Moderate
Nov27Moderate
Dec11Good
Location & terrain

Where is Mahanje?

Mahanje sits at 9.9°S, 35.3°E, 991 m above sea level, in Tanzania. The nearest listed city is Maposeni, 73 km away.

MaposeniNjombeSongeaMlangaliKigonseraMatiriMbingaMtwango

Topography around Mahanje

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

Within 3 km, the terrain around Mahanje has significant variations in elevation — a maximum elevation change of 283 m around an average of 985 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 882 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,125 m.

The land around Mahanje is covered by trees (65%) within 3 km, trees (53%) and shrubs (28%) within 16 km, and trees (56%) and shrubs (24%) within 80 km.

3 km
283 m
16 km
882 m
80 km
2,125 m
treesshrubsgrasslandcropland
December weather nearby: Maposeni 73 km · Njombe 89 km · Songea 90 km · Mlangali 91 km · Kigonsera 101 km · Matiri 102 km · Mbinga 116 km · Mtwango 118 km

Tanzania travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$1,319
2025
Happiness
3.9 / 10
World Happiness, 2025
Safe drinking water
31%
of population, 2024
Homicide rate
3.7
per 100k, 2020
Road deaths
31.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 479
Religion
Christian 63%Muslim 34%folk religion 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 Mahanje (-9.9333°, 35.3333°, elevation 991 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).