Average Weather in Mombasa Kenya
In Mombasa, the summers are hot and mostly cloudy; the winters are warm, dry, windy, and mostly clear; and it is oppressive year round. Over the course of the year, the temperature typically varies from 71°F to 89°F and is rarely below 69°F or above 91°F.
Based on the beach/pool score, the best time of year to visit Mombasa for hot-weather activities is from late June to mid October.
The hot season lasts for 3.9 months, from December 18 to April 15, with an average daily high temperature above 88°F. The hottest day of the year is March 13, with an average high of 89°F and low of 78°F.
The cool season lasts for 3.2 months, from June 17 to September 24, with an average daily high temperature below 83°F. The coldest day of the year is August 5, with an average low of 71°F and high of 81°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Mombasa, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Mombasa begins around May 25 and lasts for 5.0 months, ending around October 24. On September 1, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 72% of the time, and overcast or mostly cloudy 28% of the time.
The cloudier part of the year begins around October 24 and lasts for 7.0 months, ending around May 25. On March 22, the cloudiest day of the year, the sky is overcast or mostly cloudy 70% of the time, and clear, mostly clear, or partly cloudy 30% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Mombasa varies significantly throughout the year.
The wetter season lasts 7.1 months, from November 5 to June 7, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 54% on May 9.
The drier season lasts 4.9 months, from June 7 to November 5. The smallest chance of a wet day is 6% on September 11.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 54% on May 9.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Mombasa experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from February 16 to January 24, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 4, with an average total accumulation of 6.0 inches.
The rainless period of the year lasts for 3.2 weeks, from January 24 to February 16. The least rain falls around February 5, with an average total accumulation of 0.4 inches.
Average Monthly Rainfall
The length of the day in Mombasa does not vary substantially over the course of the year, staying within 21 minutes of 12 hours throughout. In 2018, the shortest day is June 21, with 11 hours, 53 minutes of daylight; the longest day is December 22, with 12 hours, 22 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:56 AM on November 10, and the latest sunrise is 34 minutes later at 6:30 AM on July 21. The earliest sunset is at 6:12 PM on October 25, and the latest sunset is 31 minutes later at 6:43 PM on February 3.
Daylight saving time (DST) is not observed in Mombasa during 2018.
Sunrise & Sunset with Twilight
The perceived humidity level in Mombasa, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 1% of 99% throughout.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Mombasa experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from April 30 to October 6, with average wind speeds of more than 12.0 miles per hour. The windiest day of the year is July 5, with an average hourly wind speed of 15.7 miles per hour.
The calmer time of year lasts for 6.8 months, from October 6 to April 30. The calmest day of the year is November 25, with an average hourly wind speed of 8.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Mombasa varies throughout the year.
The wind is most often from the south for 7.1 months, from April 1 to November 3, with a peak percentage of 100% on July 2. The wind is most often from the east for 4.9 months, from November 3 to April 1, with a peak percentage of 64% on January 1.
Mombasa is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 1.9 months, from March 5 to May 2, with an average temperature above 83°F. The day of the year with the warmest water is March 31, with an average temperature of 84°F.
The time of year with cooler water lasts for 3.0 months, from July 4 to October 5, with an average temperature below 79°F. The day of the year with the coolest water is August 16, with an average temperature of 77°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Mombasa throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Mombasa for general outdoor tourist activities is from late June to late September, with a peak score in the last week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Mombasa for hot-weather activities is from late June to mid October, with a peak score in the last week of August.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
Temperatures in Mombasa are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.0 months, from September 1 to November 3, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is October 4, with an average of 7.2 kWh.
The darker period of the year lasts for 3.0 months, from March 30 to June 29, with an average daily incident shortwave energy per square meter below 5.9 kWh. The darkest day of the year is April 22, with an average of 5.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Mombasa are -4.055 deg latitude, 39.664 deg longitude, and 52 ft elevation.
The topography within 2 miles of Mombasa contains only modest variations in elevation, with a maximum elevation change of 135 feet and an average elevation above sea level of 44 feet. Within 10 miles contains only modest variations in elevation (892 feet). Within 50 miles contains very significant variations in elevation (2,667 feet).
The area within 2 miles of Mombasa is covered by artificial surfaces (65%), water (18%), and trees (15%), within 10 miles by water (44%) and trees (29%), and within 50 miles by water (50%) and trees (28%).
This report illustrates the typical weather in Mombasa, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Mombasa.
For each station, the records are corrected for the elevation difference between that station and Mombasa according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Mombasa is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mombasa and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .