Climate and average weather in Nyamuswa

In Nyamuswa, the weather is hot, wet, and partly cloudy and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around December.

Best: early May to mid September

Over the course of the year, the temperature in Nyamuswa typically varies from 18°C to 30°C, and is rarely below 16°C or above 33°C. September is the hottest month of the year, while December is the coldest.

Based on the travel score, the best time of year to visit Nyamuswa for warm-weather activities is from early May to mid September.

Hottest
Sep
30°
Coldest
Dec
18°
Wettest
Dec
173 mm
Driest
Jul
13 mm
Rain / yr
1186 mm
170 wet days
Daylight
11.9–12.1 h
shortest–longest
Elevation
1,386 m
1.9°S
Clearest
Aug
59% cloud

Nyamuswa weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early May to mid September.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Nyamuswa, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Nyamuswa stay fairly even through the year, without a distinct hot or cool season. The warmest month is September, with an average high of 30°C and low of 19°C; the coolest is December, with an average low of 18°C and high of 27°C.

Days typically run about 10°C warmer than nights year-round.

15°20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2818
Feb2918
Mar2918
Apr2818
May2818
Jun2818
Jul2918
Aug2918
Sep3019
Oct3019
Nov2818
Dec2718

Average hourly temperature in Nyamuswa

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on September afternoons, near 30°C, and coldest before dawn in December, near 18°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Nyamuswa weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°1432012.14.9
Feb29° / 18°11317.112.14.5
Mar29° / 18°15019.8124.4
Apr28° / 18°16020.3124.6
May28° / 18°7312.911.95.7
Jun28° / 18°275.911.96.2
Jul29° / 18°133.211.96.3
Aug29° / 18°33611.95.8
Sep30° / 19°478.7125.1
Oct30° / 19°8814.2124.5
Nov28° / 18°16620.512.14.4
Dec27° / 18°17321.812.14.7

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Nyamuswa gets about 1186 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.

The wetter season lasts 6.8 months, from around Oct 18 to May 12, peaking in March at about 73% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 11.

December is the wettest month by volume, with 173 mm over about 22 wet days; July is the driest, with 13 mm.

0%10%20%30%40%50%60%70%80%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetMar 31 · 73%Jul 11 · 8%
Rain on a day (%)Rain days
Jan6420
Feb6117
Mar6420
Apr6820
May4213
Jun196
Jul103
Aug206
Sep299
Oct4614
Nov6721
Dec7022

Monthly rainfall

Over a full year, Nyamuswa collects about 1186 mm of rain across 170 wet days — roughly 99 mm in an average month.

It doesn’t fall evenly. December is the wettest month with 173 mm, while July is the driest at just 13 mm. The three wettest months alone bring about 42% of the year’s total.

0255075100125150175200JanFebMarAprMayJunJulAugSepOctNovDec143113150160732713334788166173
Rainfall (mm)Rain days
Jan14320
Feb11317
Mar15020
Apr16020
May7313
Jun276
Jul133
Aug336
Sep479
Oct8814
Nov16621
Dec17322

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Nyamuswa, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around May 12 and lasts for 4.6 months, ending around September 27. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 51% of the time on average.

The cloudier part of the year begins around September 28 and lasts for 2.8 months, ending around December 21. The cloudiest month is November, when it is overcast or mostly cloudy 76% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecJun 1 · 58%Nov 6 · 22%mostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan4258
Feb4357
Mar3961
Apr2575
May4555
Jun4852
Jul5050
Aug5149
Sep4852
Oct2773
Nov2476
Dec3763

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. Close to the equator, Nyamuswa barely changes through the year: days stay near 12 h 06 min of light in every season.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.16:506:56
Feb12.16:577:00
Mar12.06:536:54
Apr12.06:456:43
May11.96:436:38
Jun11.96:476:41
Jul11.96:536:47
Aug11.96:506:46
Sep12.06:396:38
Oct12.06:286:30
Nov12.16:276:32
Dec12.16:376:43

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Nyamuswa averages about 6 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 10 days.

The sunnier stretch runs 4.5 months, from around May 10 to Sep 24. The sunniest month is May, with roughly 7 sunny days (gloomy).

The greyest month is November, down near 2 sunny days — about 66% fewer than the May peak.

051015JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedMay 3010 daysNov 82 days
Sunny daysSky
Jan7Gloomy
Feb6Gloomy
Mar7Gloomy
Apr3Gloomy
May7Gloomy
Jun7Gloomy
Jul7Gloomy
Aug7Gloomy
Sep6Gloomy
Oct3Gloomy
Nov2Gloomy
Dec5Gloomy

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Nyamuswa, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 7.0 months, from around October 23 to May 23. The muggiest month is April, when the air feels humid, muggy or worse about 92% of the time.

The most comfortable stretch runs from around May 24 to October 22, and July is the most comfortable month — the air is dry or comfortable 87% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 13 · 89%Apr 26 · 6%muggyhumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan2106722
Feb3156121
Mar2125531
Apr084943
May3215620
Jun2838314
Jul5433130
Aug4531230
Sep3034351
Oct1032517
Nov0166716
Dec1106721

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Nyamuswa is steady company: average speeds sit near 7 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeJul 20 · 8 km/hApr 21 · 6 km/h
Wind speed (km/h)Feels
Jan6calm
Feb7calm
Mar6calm
Apr6calm
May6calm
Jun7calm
Jul8calm
Aug8calm
Sep7calm
Oct7calm
Nov6calm
Dec6calm

Hazard calendar for Nyamuswa

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Nyamuswa's rainy season runs October–April, when most of the year's rain falls.

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

Best time to visit Nyamuswa

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Nyamuswa throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early September, Nyamuswa is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Nyamuswa for general outdoor tourist activities is from early May to mid September, with a peak score in the first week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 6 · 6.4

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan4.8fair
Feb4.5fair
Mar4.4fair
Apr4.6fair
May5.7good
Jun6.2good
Jul6.3good
Aug5.8good
Sep5.1fair
Oct4.5fair
Nov4.4fair
Dec4.6fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Nyamuswa for hot-weather activities is from mid May to early October, with a peak score in the second week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 13 · 8.1

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Nyamuswa, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

Nyamuswa packs about the same all year — highs hold near 30°C. Across the year the things worth having are light clothes, rain gear and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In September, Nyamuswa sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

UV index (midday) in Nyamuswa by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Nyamuswa peaks around March 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 17UV 16Jun 18UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun9Very high
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct14Extreme
Nov13Extreme
Dec12Extreme

Average hourly UV index in Nyamuswa

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in March the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan86.5
Feb8.56.5
Mar8.56.5
Apr8.56.5
May7.55.5
Jun7.55
Jul7.55.5
Aug86
Sep86
Oct86.5
Nov86.5
Dec86

Air quality in Nyamuswa by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Nyamuswa is worst in July — around 20 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJul 1319 µg/m³Nov 1410 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb16Moderate
Mar13Moderate
Apr11Good
May12Good
Jun18Moderate
Jul20Moderate
Aug16Moderate
Sep15Moderate
Oct11Good
Nov10Good
Dec12Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Nyamuswa is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Nyamuswa banks about 4,878 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around September.

02,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan398
Feb377
Mar418
Apr390
May404
Jun397
Jul413
Aug426
Sep428
Oct440
Nov394
Dec393

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Nyamuswa receives about 5.8 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 5.4 and 6.4 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmoderatebrightintenseFeb 286.4 kWhJun 205.4 kWh
Solar energy (kWh/m²)Level
Jan5.9Bright
Feb6.3Intense
Mar6.2Intense
Apr5.7Bright
May5.6Bright
Jun5.4Bright
Jul5.6Bright
Aug5.8Bright
Sep6.1Intense
Oct5.8Bright
Nov5.5Bright
Dec5.6Bright

Where is Nyamuswa?

Nyamuswa sits at 1.9°S, 34.0°E, 1,386 m above sea level, in Tanzania. The nearest listed city is Butiama, 16 km away.

TarimeMatongoMugumuNyakabindi

Topography around Nyamuswa

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

Within 3 km, the terrain around Nyamuswa has only modest variations in elevation — a maximum elevation change of 176 m around an average of 1,370 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 573 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Nyamuswa is covered by cropland (57%) and shrubs (21%) within 3 km, cropland (53%) and shrubs (28%) within 16 km, and grassland (33%) and cropland (32%) within 80 km.

3 km
176 m
16 km
573 m
80 km
656 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
Nearby: Butiama 16 km · Bunda 21 km · Musoma 51 km · Kibara 69 km · Tarime 72 km · Matongo 74 km · Mugumu 76 km · Nyakabindi 82 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 Nyamuswa (-1.9°, 34.0167°, elevation 1,386 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).