Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Horta's average high-temperature in September sits at a still pleasant 22.1°C (71.8°F), showing little difference from the previous month. Horta records a slight downturn in temperature to an average of 20.7°C (69.3°F) during September nights.Humidity
In Horta, the average relative humidity in September is 79%.Rainfall
In Horta, during September, the rain falls for 13.3 days and regularly aggregates up to 35mm (1.38") of precipitation. Throughout the year, in Horta, there are 191.6 rainfall days, and 629mm (24.76") of precipitation is accumulated.Sea temperature
In September, the average sea temperature is 23.2°C (73.8°F).Note: The cold tolerance of an individual, along with sunshine, wind, and the temperature of the environment, affects the enjoyment of swimming in 23.2°C (73.8°F) waters. (Olympic swimmers participate in waters ranging from 25°C (77°F) to 28°C (82.4°F).)
Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 07:24 and sunset at 20:24. On the last day of September, in Horta, sunrise is at 07:49 and sunset at 19:38 +00.
Sunshine
In Horta, Portugal, the average sunshine in September is 7.8h.UV index
In Horta, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 in September translates into these instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. It's recommended to limit sun exposure when its radiation is at its peak during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Caution! The Sun's UV intensity grows with reflections off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Horta in September?
What is the average humidity in September in Horta?
How much does it rain in Horta in September?
What is the water temperature in September in Horta?
What is the average length of the day in September in Horta?
What time are sunrise and sunset in September in Horta?
How many hours of sunshine does Horta have in September?
What is the UV index intensity in September in Horta?
Average temperature in September
Horta, Portugal
- Average high temperature in September: 22.1°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is March (15.4°C).
- Average low temperature in September: 20.7°C
The month with the highest average low temperature is August (21.3°C).
The coldest month (with the lowest average low temperature) is March (13.8°C).
Average pressure in September
Horta, Portugal
- Average pressure in September: 1020.9mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is October (1016.8mbar).
Average wind speed in September
Horta, Portugal
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is December (26.6km/h).
The calmest month (with the lowest average wind speed) is July (14.9km/h).
Average humidity in September
Horta, Portugal
- Average humidity in September: 79%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is November (78%).
Average rainfall in September
Horta, Portugal
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is December (90mm).
The driest month (with the least rainfall) is July (25mm).
Average rainfall days in September
Horta, Portugal
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is December (19 days).
The months with the least rainy days are June and July (12.5 days).
Average sea temperature in September
Horta, Portugal
- Average sea temperature in September: 23.2°C
The best month for swimming (with the highest average sea temperature) is August (23.9°C).
The coldest month (with the lowest average sea temperature) is March (15.8°C).
Average daylight in September /
Average sunshine in September
Horta, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days in September
Horta, Portugal
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is July (14.2 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in September
Horta, Portugal
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 4).
Average cloud cover in September
Horta, Portugal
- Average cloud cover in September: 43
The month with the most cloud cover is November (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 43).
Average visibility in September
Horta, Portugal
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Horta, Portugal
Weather forecast for your location
2. Allow the app to use your location