September weather forecast
Grapeland, CA

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Weather in September

September, the first month of the autumn in Grapeland, is still a hot month, with an average temperature varying between 88.3°F (31.3°C) and 63.7°F (17.6°C).

Temperature

The shift into September reveals an average high-temperature of a still hot 88.3°F (31.3°C), closely mirroring August's climate. The September nights bear witness to a significant drop from the daytime highs, settling at an average temperature of 63.7°F (17.6°C).

Heat index

September's average heat index is computed to be a hot 89.6°F (32°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.

Humidity

The average relative humidity in September is 43%.

Rainfall

In Grapeland, during September, the rain falls for 1.8 days and regularly aggregates up to 0.08" (2mm) of precipitation. Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.

Snowfall

In Grapeland, snow does not fall in January, March through December.

Daylight

The average length of the day in September in Grapeland is 12h and 22min.
On the first day of the month, sunrise is at 6:24 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:35 pm PDT.

Sunshine

The average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 6 during September translates into these guidelines:
Guard against overexposure. Protection from sun-induced harm is essential. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

In September, in Grapeland, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 63.7°F (17.6°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is computed to be 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity is 43%.

How much does it rain in September?

In Grapeland, in September, during 1.8 rainfall days, 0.08" (2mm) of precipitation is typically accumulated.

When it does not snow in Grapeland?

In Grapeland, snow does not fall in January, March through December.

How many hours of daylight does Grapeland have in September?

In Grapeland, the average day length in September is 12h and 22min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:24 am and sunset at 7:15 pm. On the last day of the month, in Grapeland, sunrise is at 6:44 am and sunset at 6:35 pm PDT.

How long on average sun shines in September?

The average sunshine duration in September in Grapeland is 10.7h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
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
Grapeland, CA

Average temperature in September - Grapeland, CA
  • Average high temperature in September: 88.3°F

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in September: 63.7°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

Average pressure in September
Grapeland, CA

Average pressure in September - Grapeland, CA
  • Average pressure in September: 29.88"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in September
Grapeland, CA

Average wind speed in September - Grapeland, CA
  • Average wind speed in September: 4.5mph

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

Average humidity in September
Grapeland, CA

Average humidity in September - Grapeland, CA
  • Average humidity in September: 43%

The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

Average rainfall in September
Grapeland, CA

Average rainfall in September - Grapeland, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in September
Grapeland, CA

Average rainfall days in September - Grapeland, CA
  • Average rainfall days in September: 1.8 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

Average snowfall days in September
Grapeland, CA

Average snowfall days in September - Grapeland, CA
  • Average snowfall days in September: 0 days

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

Average daylight in September /
Average sunshine in September
Grapeland, CA

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

Average sunshine days in September
Grapeland, CA

Average sunshine days in September - Grapeland, CA
  • Average sunshine days in September: 26 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

Average UV index in September
Grapeland, CA

Average UV index in September - Grapeland, CA
  • Average UV index in September: 6

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in September
Grapeland, CA

Average cloud cover in September - Grapeland, CA
  • Average cloud cover in September: 6

The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

Average visibility in September
Grapeland, CA

Average visibility in September - Grapeland, 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).

Grapeland, California, USA

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