Climate and monthly weather forecast
Stone Town, Tanzania

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The climate of Stone Town

Stone Town, situated in Tanzania, is recognized as a location where the predominant climate category is Am as per the Köppen climate classification. This suggests a Tropical Monsoon climate, with an abundance of heat and humidity, which can notably influence weather patterns throughout the year.

In-depth assessment of climatological parameters validates this classification. Across the twelve months, average high temperatures fluctuate minimally, hovering around the 27.5°C (81.5°F) to 29.9°C (85.8°F) range. The average low temperatures show a similar pattern, stabilizing between 23.5°C (74.3°F) to 27°C (80.6°F) throughout the year, indicating constant warm weather regardless of the season.

Bearing witness to the tropical monsoon climate, there is considerable variance in the average monthly rainfall, ranging from a low of 31mm (1.22") to a peak of 296mm (11.65"). Also, the total number of rainfall days indicates frequent precipitation throughout the year, with 14.2 to 27.6 days of rain expected per month. Although consistent, sunshine hours only vary lightly from 8.1 to 8.9 hours with pressure levels oscillating between 1010.2mb to 1016.9mb.

The best time to visit Stone Town

Balancing variables such as rainfall, daylight hours, and temperature, it emerges that the period spanning June through August is the most appealing time to plan a trip to Stone Town. Highly conducive weather conditions prevail in these months, with average high temperatures landing between 26.8°C (80.2°F) and 27.5°C (81.5°F), easing the intensity of the tropical heat.

Additionally, these months witness relatively reduced rainfall compared to other times, registering 38mm (1.5") to 44mm (1.73"). This corresponds well with the increased number of daylight hours (from 11.8 hours to 12 hours on average), facilitating longer exploration times. Average relative humidity likewise dampers down to 75% in comparison to the yearly peak of 78%, offering a more comfortable atmosphere for outdoor activities.

The worst time to visit Stone Town

Visitors might wish to evade the months of April and May. A peak in rainfall occurs during this season, particularly in April, where average precipitation reaches an annual high of 296mm (11.65"). Consequently, these months average the highest number of rain days, from 25.6 to 27.6 days. Moreover, frequent rainfall contributes to elevated levels of cloud cover which further reduces visibility and brings down the average number of sunshine hours to 8.1 to 8.2 hours a day.

Spring weather in Stone Town

The months from March to May mark the spring season in Stone Town. The period distinguishes itself by an increase in both average low temperatures (from 26.2°C (79.2°F) to 25.3°C (77.5°F)) and average high temperatures (from 29.9°C (85.8°F) to 28.2°C (82.8°F)). March introduces a noteworthy leap in rainfall, with precipitation almost tripling from 42mm (1.65") to 111mm (4.37"). The dessert of this increasement becomes a downpour in April, boasting the highest average rainfall of the year at 296mm (11.65").

Summer weather in Stone Town

Summer, stretching from June to August, is characterized by a notable decrease in rainfall, favorably weather calms down from 217mm (8.54") in May to 44mm (1.73") in June. Days of rainfall are also reduced, and average temperatures moderate, with high temperatures dipping to a comfortable range of 26.8°C (80.2°F) to 27.5°C (81.5°F) and lows fluctuating between 23.5°C (74.3°F) and 24.2°C (75.6°F). Sunshine hours remain consistent at approximately 8.8 to 8.9 hours per day.

Autumn weather in Stone Town

Autumn commences with temperatures averaging from 27.2°C (81°F) to 27.9°C (82.2°F) and lows from 23.9°C (75°F) to 24.9°C (76.8°F). Rainfall and rain days increase slightly, averaging from 31mm (1.22") to 79mm (3.11") and 17.2 to 18.2 days, respectively. Average daylight hours and sunshine days remain constant, ensuring sufficient time for outdoor activities.

Winter weather in Stone Town

The winter season in Stone Town, from December to February, enlivens the city with peak sunshine hours. Average high temperatures remain at a toasty 29.4°C (84.9°F) to 29.6°C (85.3°F) and average low temperatures linger around a warm 26.8°C (80.2°F) to 27°C (80.6°F). Rainfall increases from the preceding months, with totals escalating from 106mm (4.17") to 114mm (4.49"), and the number of rainfall days also surges from 21.5 to 26.2 days.

Weather in January

The weather in Stone Town, Tanzania, typically begins the year reliably warm, similar to December's tropical temperatures. A high of 29.4°C (84.9°F) precedes slightly cooler nights marked by a low of 27°C (80.6°F), characteristic of the town's moderate tropical climate. Weather in January »

Weather in February

In February, the temperature in Stone Town fluctuates slightly from the preceding month, with an increase in the average high and a decrease in the average low. February's weather is marked by a slight drop in wind speed from 19.6km/h (12.2mph) to 16.7km/h (10.4mph), making it less blustery than January. Weather in February »

Weather in March

Moving into March, the spread of temperatures slightly widens, reflecting a rise in daily low temperatures. This month sees a considerable increase in rainfall from 42mm (1.65") to 111mm (4.37"), signaling the impending rainy season. Weather in March »

Weather in April

Stone Town in April undergoes a remarkable shift as the town enters its most substantial rainy season registering 296mm (11.65") of rainfall. While temperatures remain stable, the climate significantly changes due to this increase in precipitation. Weather in April »

Weather in May

The month of May ushers in a period of cooler nights in Stone Town, with a transition to increasingly comfortable temperatures, hence a break from the constant heat. This town experiences a significant drop in rain levels from 296mm (11.65") in April to 217mm (8.54"). Weather in May »

Weather in June

June in Stone Town often signals the driest period, distinguished by a brisk wind and relatively diminished rainfall. Regardless of the escalating wind speed from 19.8km/h (12.3mph) to 20.2km/h (12.6mph), conditions remain pleasant for various outdoor activities. Weather in June »

Weather in July

July continues the trend initiated by June, with the dry season in Stone Town reaching its peak. Throughout July, the humidity levels remain stable, contributing to the pleasantly cool period. Perhaps the most significant characteristic of July is its minimal rainfall, even lower than June's already low levels, and carrying on into August. Weather in July »

Weather in August

In Stone Town, August is highly anticipated, not for a dramatic change in weather from July, but for its consistently pleasant conditions. August maintains nearly identical rainfall and wind speeds as July, maintaining the dry season's charm. Weather in August »

Weather in September

As the calendar turns to September, Stone Town witnesses a slight increase in rainfall but still maintains comfortable conditions for experiencing Tanzanian life. Despite the slight increase in rainfall from 38mm (1.5") in August to 31mm (1.22") in September, the month continues to be relatively dry. Weather in September »

Weather in October

October brings hotter days to Stone Town while maintaining the dry spell dominating the previous half of the year. This month is generally slightly warmer than September but has a more significant increase in rainfall. Despite being preceded and succeeded by higher rainfall months, October remains fairly dry, a factor that adds to its charm. Weather in October »

Weather in November

November marches into Stone Town with an evident increase in virtually all aspects of weather patterns, from temperatures to rainfall. Notably, rainfall increases significantly from 79mm (3.11") in October to 106mm (4.17") in November, indicating the return of the wet season. Weather in November »

Weather in December

December in Stone Town is characterized by a significant increase in precipitation bringing in the town's second rainy season. The town records a rise in rainfall from 106mm (4.17") in November to a substantial 114mm (4.49") in December. Weather in December »

Frequently asked questions

What is the most humid month in Stone Town?

The months with the highest humidity in Stone Town, Tanzania, are January, April, May and November, with an average relative humidity of 78%.

How much does it rain in Stone Town?

In Stone Town, Tanzania, during the entire year, the rain falls for 255.1 days and collects up to 1172mm (46.14") of precipitation.

What are the months with the highest UV index in Stone Town?

January through March, October through December, with an average maximum UV index of 7, are months with the highest UV index in Stone Town, Tanzania.

What is the hottest time of year in Stone Town?

March, with its high-temperature average of 29.9°C (85.8°F) and a low-temperature average of 27.2°C (81°F), is the warmest month in Stone Town.

What is the rainiest month in Stone Town?

April is the month with the most rainfall in Stone Town, Tanzania. Rain falls for 27.6 days and accumulates 296mm (11.65") of precipitation.

When is the lowest UV index in Stone Town?

The months with the lowest UV index in Stone Town are April through September, with an average maximum UV index of 6.

What is the month with the least sunshine in Stone Town?

The month with the least sunshine in Stone Town, Tanzania, is May, with an average of 8.1h of sunshine.

What is the least humid month in Stone Town?

The months with the lowest humidity are June and July, with an average relative humidity of 75%.

What is the month with the shortest days in Stone Town?

June has the shortest days of the year, with an average of 11h and 48min of daylight.

What time of the year is the coldest in Stone Town?

Temperature records in Stone Town, Tanzania, mark August as the coldest month, with highs averaging 26.8°C (80.2°F) and lows at 23.5°C (74.3°F).

What is the driest month in Stone Town?

September is the month with the least rainfall in Stone Town. Rain falls for 17.2 days and accumulates 31mm (1.22") of precipitation.

What month has the most sunshine in Stone Town?

With an average of 10.7h of sunshine, November has the most sunshine of the year in Stone Town.

When are the longest days in Stone Town?

The month with the longest days in Stone Town, Tanzania, is December, with an average of 12h and 30min of daylight.

Is there Daylight Saving Time (DST) in Stone Town?

Stone Town does not utilize Daylight Saving Time (DST). EAT timezone is used over the entire year.

Average temperature
Stone Town, Tanzania

Average temperature - Stone Town, Tanzania

The warmest month (with the highest average high temperature) is March (29.9°C).
The month with the lowest average high temperature is August (26.8°C).

The month with the highest average low temperature is March (27.2°C).
The coldest month (with the lowest average low temperature) is August (23.5°C).

Average pressure
Stone Town, Tanzania

Average pressure - Stone Town, Tanzania

The month with the highest atmospheric pressure is July (1016.9mbar).
The month with the lowest atmospheric pressure is February (1010.2mbar).

Average wind speed
Stone Town, Tanzania

Average wind speed - Stone Town, Tanzania

The windiest month (with the highest average wind speed) is July (20.6km/h).
The calmest month (with the lowest average wind speed) is November (11.8km/h).

Average humidity
Stone Town, Tanzania

Average humidity - Stone Town, Tanzania

The months with the highest relative humidity are January, April, May and November (78%).
The months with the lowest relative humidity are June and July (75%).

Average rainfall
Stone Town, Tanzania

Average rainfall - Stone Town, Tanzania

The wettest month (with the highest rainfall) is April (296mm).
The driest month (with the least rainfall) is September (31mm).

Average rainfall days
Stone Town, Tanzania

Average rainfall days - Stone Town, Tanzania

The month with the highest number of rainy days is April (27.6 days).
The month with the least rainy days is February (14.2 days).

Average daylight / Average sunshine
Stone Town, Tanzania

Average daylight / Average sunshine - Stone Town, Tanzania

The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).

The month with the most sunshine is November (Average sunshine: 10h and 42min).
The month with the least sunshine is May (Average sunshine: 8h and 6min).

Average sunshine days
Stone Town, Tanzania

Average sunshine days - Stone Town, Tanzania

The month with the most sunshine days is February (7.9 days).
The month with the least sunshine days is April (1.7 days).

Average UV index
Stone Town, Tanzania

Average UV index - Stone Town, Tanzania

The months with the highest UV index are January, February, March, October, November and December (UV index 7).
The months with the lowest UV index are April, May, June, July, August and September (UV index 6).

Average visibility
Stone Town, Tanzania

Average visibility - Stone Town, Tanzania

The months with the highest visibility are January, February, March, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are April and May (9km).

Stone Town, Tanzania

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