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This page shows both the average monthly rainfall and the number of rainy days in Nizwa, Ad Dakhiliyah, Oman. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.
Nizwa experiences desert-like conditions in terms of precipitation with almost no rainfall, generally receiving 110 mm (4.3 in) annually.
The seasons in Nizwa, bring significant changes in precipitation. The wettest month, March, receives low rainfall, with an average of 20 mm (0.8 in) of precipitation. This rainfall is distributed across 2 rainy days.
In contrast, the driest month, September, experiences much less rainfall, totaling 2.4 mm (0.1 in) over a single rainy day. These distinct seasonal differences provide diverse experiences throughout the year.March, the wettest month, has a maximum daytime temperature of 31°C (88°F). During the driest month September you can expect a temperature of 38°C (100°F). For more detailed insights into the city's temperatures, visit our Nizwa Temperature page.
Average daily rainfall for each day of the month based on long-term records. 45-year average (1979-2025)
Browse day-by-day precipitation records for Nizwa spanning 49 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
The map below shows the annual precipitation across Oman. You can also select the different months in case you are interested in a specific month.
Nizwa's average annual precipitation is 110 mm (4.3 in). Let's compare this to some popular worldwide tourist destinations:
Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Climate change is affecting precipitation patterns worldwide, including Nizwa:
For more detailed information about Nizwa's weather, including sunshine hours, humidity levels, and temperature data, visit our Nizwa Climate page.
Pick a month to see the average temperature, rainfall and sunshine in Nizwa - and find the best time to visit.
Temperature Rainfall
See the full Nizwa climate overview or explore weather in Oman.
Where to go in September - average daytime high across popular destinations.
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