Stornoway Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Stornoway. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s explore all the details to give you a full picture.

Stornoway has a notably wet climate with abundant precipitation, recording 1238 mm of rainfall per year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

The wettest period in Stornoway occurs in October, which receives around 123 mm of precipitation. During the driest month, May, Stornoway experiences moderate rainfall, totaling approximately 84 mm. The consistent precipitation levels throughout the year contribute to a relatively stable climate.

October, the wettest month, has a maximum daytime temperature of 13°C. The city receives 82 hours of sunshine in this period. During the driest month May you can expect a temperature of 14°C. For more detailed insights into the city’s temperatures, visit our Stornoway Temperature page.

Annual Precipitation in the United Kingdom

The map below shows the annual precipitation across the United Kingdom. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Stornoway’s average annual precipitation is 1238 mm. Let’s compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages [964 mm], with snowy winters and rainy summers.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm of annual rainfall, mostly in the summer.

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm of annual rainfall, with the heaviest precipitation occurring during September and October.

How is Precipitation Measured?

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.

How Does Precipitation Affect Local Climate?

Precipitation has a very strong role in determining the local climate and ecosystem:

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

For more detailed information about Stornoway’s weather, including sunshine hours, humidity levels, and temperature data, visit our Stornoway Climate page.