Average weather, temperature, rainfall, sunshine hours
The climate of Concord is
Mediterranean, with mild, rainy winters and hot, sunny summers.
The city is located near the coast of Suisun Bay, a northern extension of San Francisco Bay. Nearby are cities such as Pleasant Hill, Pacheco, Walnut Creek, Clayton, Pittsburg, Bay Point and Clyde.
Winter, from December to February, is mild, with periods of bad weather alternating with sunny periods. In the latter, fog can form at night.
On average, there are 9 days on which the minimum temperature is equal to or below freezing, and that usually happens from November through February. However, the temperature generally drops slightly below freezing. In December 1990, it dropped to -5.5 °C (22 °F).
Summer, from June to September, is hot and sunny, with quite cool nights. There can be very hot periods, in which the wind blows from the desert, but even in these cases, the temperature generally drops below 20 °C (68 °F) during the night, thanks to the breeze coming from the bay.
On average, there are 9 days with a maximum temperature equal to or above 37.8 °C (100 °F), and that usually happens from June through September. However, short hot periods, in which the wind blows from the desert and the temperature exceeds 32 °C (90 °F), can also occur in April, May and October.
The
average temperature of the coldest month (January) is of 9.7 °C (49 °F), that of the warmest month (August) is of 23.1 °C (74 °F). Here are the average temperatures.
Concord (Ca) - Average temperatures (1991-2020) | Month | Min (°C) | Max (°C) | Mean (°C) | Min (°F) | Max (°F) | Mean (°F) |
|---|
| January | 5 | 14 | 9.7 | 41 | 58 | 49.4 |
|---|
| February | 7 | 17 | 11.6 | 44 | 62 | 53 |
|---|
| March | 8 | 19 | 13.7 | 47 | 67 | 56.6 |
|---|
| April | 10 | 22 | 15.6 | 49 | 71 | 60.2 |
|---|
| May | 12 | 25 | 18.5 | 53 | 78 | 65.2 |
|---|
| June | 14 | 29 | 21.5 | 57 | 84 | 70.6 |
|---|
| July | 15 | 31 | 23 | 59 | 88 | 73.4 |
|---|
| August | 15 | 31 | 23.1 | 59 | 88 | 73.6 |
|---|
| September | 14 | 30 | 22 | 58 | 85 | 71.6 |
|---|
| October | 11 | 26 | 18.5 | 53 | 78 | 65.4 |
|---|
| November | 7 | 19 | 13.1 | 45 | 66 | 55.6 |
|---|
| December | 5 | 15 | 9.7 | 41 | 58 | 49.4 |
|---|
| Year | 10.3 | 23.1 | 16.65 | 50.5 | 73.6 | 62 |
|---|
amounts to 410 millimeters (16.1 inches) per year: it is therefore quite scarce. It ranges from 0 mm (0 in) in the driest months (July, August, September) to 80 mm (3.1 in) in the wettest ones (January, February, December). Here is the average precipitation.
Concord (Ca) - Average precipitation| Month | Millimeters | Inches | Days |
|---|
| January | 80 | 3.1 | 9 |
|---|
| February | 80 | 3.1 | 9 |
|---|
| March | 55 | 2.2 | 9 |
|---|
| April | 30 | 1.2 | 5 |
|---|
| May | 15 | 0.6 | 3 |
|---|
| June | 5 | 0.2 | 1 |
|---|
| July | 0 | 0 | 0 |
|---|
| August | 0 | 0 | 0 |
|---|
| September | 0 | 0 | 1 |
|---|
| October | 20 | 0.8 | 3 |
|---|
| November | 40 | 1.6 | 6 |
|---|
| December | 80 | 3.1 | 10 |
|---|
| Year | 410 | 16.1 | 56 |
|---|
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The
sea temperature ranges between 12 °C (53 °F) and 14 °C (58 °F). So, it is cold all year round. Here are the average sea temperatures.
Concord (Ca) - Sea temperature| Month | Celsius (°C) | Fahrenheit (°F) |
|---|
January | 12 | 54 | February | 12 | 54 | March | 12 | 54 | April | 12 | 53 | May | 12 | 53 | June | 12 | 54 | July | 13 | 56 | August | 14 | 57 | September | 14 | 58 | October | 14 | 58 | November | 14 | 56 | December | 13 | 55 | Year | 12.9 | 55.2 |
Best Time
The best times to visit Concord are spring and autumn, and in particular the months of April, May and October. It can get very hot at times, but less often than in summer.
Back to
California.