Weather and Climate in the U.S.

Eastern United States

When it comes to understanding the weather and planning your U.S. road trip, a picture is worth a thousand words.

The following table shows average temperatures for Boston (Massachusetts), along with monthly precipitation (rain/snow).

Read our article on "When should I visit?" for more information.

Month	Average temperature min (°C)	Average temperature max (°C)	Precipitations (mm)
January	-6	3	94
February	-5	4	84
March	-1	9	106
April	5	14	97
May	10	20	88
June	15	25	92
July	19	28	86
August	18	27	87
September	14	23	86
October	8	18	96
November	4	12	88
December	-3	6	93

Of course, the Eastern U.S. is a large area and there can be significant differences from one place to another.

Here is a climate table for the city of San Francisco, California, USA.

Read our article on "When should I visit?" for more information.

Month	Average temperature min (°C)	Average temperature max (°C)	Precipitations (mm)
January	8	15	86
February	9	17	84
March	10	18	90
April	11	20	36
May	12	21	32
June	13	23	39
July	14	23	36
August	14	23	36
September	15	24	30
October	14	23	33
November	11	18	60
December	8	15	74

Climate and weather in the Western U.S. change a great deal from one place to another, depending on whether you are in a desert region.