September weather forecast
Tierra Buena, CA

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Weather in September

The first month of the autumn, September, is also a hot month in Tierra Buena, California, with temperature in the range of an average high of 89.4°F (31.9°C) and an average low of 60.4°F (15.8°C).

Temperature

Start of September brings a slight shift in the average high-temperature, dipping a bit from August's torrid 95.2°F (35.1°C) to a hot 89.4°F (31.9°C). A marked difference from the daytime temperatures, Tierra Buena's nighttime temperature falls to an average low of 60.4°F (15.8°C) in September.

Humidity

July and September, with an average relative humidity of 38%, are the least humid months.

Rainfall

In Tierra Buena, in September, during 1.9 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. In Tierra Buena, California, during the entire year, the rain falls for 69.8 days and collects up to 10.79" (274mm) of precipitation.

Snowfall

January through November are months without snowfall.

Daylight

In Tierra Buena, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:50 pm PDT.

Sunshine

In September, the average sunshine is 11.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 5 in September translates into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

In September, in Tierra Buena, the average high-temperature is 89.4°F (31.9°C), and the average low-temperature is 60.4°F (15.8°C). In June, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 91.4°F (33°C).

What is the least humid month?

The months with the lowest humidity are July and September, with an average relative humidity of 38%.

What is the average humidity in September?

The average relative humidity in September is 38%.

How much does it rain in September?

In Tierra Buena, during September, the rain falls for 1.9 days and regularly aggregates up to 0.16" (4mm) of precipitation.

When it does not snow?

In Tierra Buena, snow does not fall in January through November.

What is the average length of the day in September?

The average day length in September is 12h and 26min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm PDT.

How long on average sun shines in September?

In Tierra Buena, the average sunshine duration in September is 11.2h.

How high is the UV index in September?

In September, the average daily maximum UV index in Tierra Buena is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Tierra Buena, CA

Average temperature in September - Tierra Buena, CA
  • Average high temperature in September: 89.4°F

The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in September: 60.4°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (41°F).

Average pressure in September
Tierra Buena, CA

Average pressure in September - Tierra Buena, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in September
Tierra Buena, CA

Average wind speed in September - Tierra Buena, CA
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).

Average humidity in September
Tierra Buena, CA

Average humidity in September - Tierra Buena, CA
  • Average humidity in September: 38%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (38%).

Average rainfall in September
Tierra Buena, CA

Average rainfall in September - Tierra Buena, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is March (2.17").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in September
Tierra Buena, CA

Average rainfall days in September - Tierra Buena, CA
  • Average rainfall days in September: 1.9 days

The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is July (0.9 days).

Average snowfall days in September
Tierra Buena, CA

Average snowfall days in September - Tierra Buena, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight in September /
Average sunshine in September
Tierra Buena, CA

Average daylight in September / Average sunshine in September - Tierra Buena, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in September
Tierra Buena, CA

Average sunshine days in September - Tierra Buena, CA
  • Average sunshine days in September: 27.4 days

The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (16.8 days).

Average UV index in September
Tierra Buena, CA

Average UV index in September - Tierra Buena, CA
  • Average UV index in September: 5

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in September
Tierra Buena, CA

Average cloud cover in September - Tierra Buena, CA
  • Average cloud cover in September: 8

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in September
Tierra Buena, CA

Average visibility in September - Tierra Buena, CA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Tierra Buena, California, USA

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