Los Altos Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Los Altos, Spain. This average is based on long-term data collected between 1990 and 2020. Let's now guide you through the details for a complete overview.
Los Altos typically sees modest rainfall throughout the year, with an average annual precipitation of 304 mm (12 in). The city experiences a distinct dry season during certain months, as illustrated in the graph below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, September receives substantial rainfall, averaging 42 mm (1.7 in) of precipitation, recorded across 5 rainy days.
In contrast, the driest month, July brings less rainfall, with 2.3 mm (0.1 in) over 3 rainy days.
September, the wettest month, has a maximum daytime temperature of 29°C (84°F). During the driest month July you can expect a temperature of 31°C (88°F). For more detailed insights into the city's temperatures, visit our Los Altos Temperature page.
Annual Rainfall in Spain: City Comparison
The map below shows the annual precipitation across Spain. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Los Altos vs World: Rainfall Compared
Los Altos's average annual precipitation is 304 mm (12 in). Let's compare this to some popular worldwide tourist destinations:
In Toronto, Canada, annual precipitation averages 964 mm (38 in), with snowy winters and rainy summers.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
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.
Precipitation has a very strong role in determining the local climate and ecosystem:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Los Altos's weather, including sunshine hours, humidity levels, and temperature data, visit our Los Altos Climate page.
