, with cold winters and hot, sunny summers, and with strong temperature variations between night and day.
. Across the Snake River is the city of Payette, in Idaho.
, cold waves are possible, during which the temperature can drop to -20 °C (-4 °F) or even below. In January 2017, it dropped to -29 °C (-20 °F). Snowfalls are generally not abundant, given that the climate is arid. In an average year, 35 cm (13 in) of snow fall.
there are strong temperature variations between night and day. During the day, it is often very hot, and sometimes the temperature can reach or exceed 40 °C (104 °F).
To visit Ontario, you can choose the months of May and September. It is true that it rains a little more often than in summer (especially in May), and that it gets colder at night, but in this way, you can avoid the heat that can occur in summer. September is probably the best month.
. Here are the average temperatures.
January, the coldest month of the year, is generally a very cold month. The average temperature is of
-0.4 °C, with a minimum of
-4.3 °C and a maximum of
3.5 °C.
On the coldest nights of the month, the temperature usually drops to around
-14 °C. However, it dropped to
-28.9 °C in January 2017.
On the warmest days of the month, the temperature usually reaches around
10 °C. However, it reached
15 °C in January 2004.
Precipitation amounts to
35 mm, distributed over 10 days.
The day lasts on average 9 hours and 20 minutes.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of
6.5 kph.
February is generally a cold month. The average temperature is of
3 °C, with a minimum of
-2.2 °C and a maximum of
8.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-10 °C. However, it dropped to
-13.3 °C in February 2004.
On the warmest days of the month, the temperature usually reaches around
14.5 °C. However, it reached
19.4 °C in February 2015.
Precipitation amounts to
25 mm, distributed over 8 days.
The day lasts on average 10 hours and 30 minutes.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
8.7 kph.
March is generally a quite mild month. However, there are remarkable differences between night and day. The average temperature is of
7.9 °C, with a minimum of
1.1 °C and a maximum of
14.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-6.5 °C. However, it dropped to
-10.6 °C in March 2002.
On the warmest days of the month, the temperature usually reaches around
21.5 °C. However, it reached
27.2 °C in March 2004.
Precipitation amounts to
25 mm, distributed over 10 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 59%.
The average wind speed is of
10.3 kph.
April is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
11.5 °C, with a minimum of
4.1 °C and a maximum of
18.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-4 °C. However, it dropped to
-7.2 °C in April 2008.
On the warmest days of the month, the temperature usually reaches around
27 °C. However, it reached
32.2 °C in April 2012.
Precipitation amounts to
20 mm, distributed over 7 days.
The day lasts on average 13 hours and 30 minutes.
The average humidity is 50%.
The average wind speed is of
12.3 kph.
May is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
16.8 °C, with a minimum of
8.8 °C and a maximum of
24.7 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-3.3 °C in May 2002.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
37.8 °C in May 2003.
Precipitation amounts to
30 mm, distributed over 8 days.
The day lasts on average 14 hours and 50 minutes. So the days are long.
The average humidity is 47%.
The average wind speed is of
11.3 kph.
June is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
21 °C, with a minimum of
12.7 °C and a maximum of
29.3 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
2.2 °C in June 2000.
On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
42.8 °C in June 2015.
Precipitation amounts to
20 mm, distributed over 6 days.
The day lasts on average 15 hours and 25 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 41%.
The average wind speed is of
11.1 kph.
July, the hottest month of the year, is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
25.7 °C, with a minimum of
16.4 °C and a maximum of
35.1 °C.
On the coldest nights of the month, the temperature usually drops to around
10 °C. However, it dropped to
6 °C in July 1999.
On the warmest days of the month, the temperature usually reaches around
40 °C. However, it reached
44.4 °C in July 2002.
Precipitation amounts to only
5 mm, distributed over 2 days.
The day lasts on average 15 hours and 5 minutes. So the days are long.
The average humidity is 34%. Hence, the air is normally dry.
The average wind speed is of
9.6 kph.
August is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
24.5 °C, with a minimum of
14.9 °C and a maximum of
34.1 °C.
On the coldest nights of the month, the temperature usually drops to around
8 °C. However, it dropped to
4 °C in August 1999.
On the warmest days of the month, the temperature usually reaches around
39 °C. However, it reached
41.7 °C in August 2020.
Precipitation amounts to only
5 mm, distributed over 2 days.
The day lasts on average 13 hours and 55 minutes.
The average humidity is 37%.
The average wind speed is of
8.4 kph.
September is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
18.9 °C, with a minimum of
9.6 °C and a maximum of
28.2 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-2.8 °C in September 2000.
On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
38.3 °C in September 2019.
Precipitation amounts to only
5 mm, distributed over 3 days.
The day lasts on average 12 hours and 25 minutes.
The average humidity is 44%.
The average wind speed is of
7.9 kph.
October is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
11.6 °C, with a minimum of
3.7 °C and a maximum of
19.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-4 °C. However, it dropped to
-12.8 °C in October 2019.
On the warmest days of the month, the temperature usually reaches around
27.5 °C. However, it reached
33 °C in October 1997.
Precipitation amounts to
15 mm, distributed over 5 days.
The day lasts on average 10 hours and 55 minutes.
The average humidity is 56%.
The average wind speed is of
8 kph.
November is generally a quite cold month. The average temperature is of
4.2 °C, with a minimum of
-1.4 °C and a maximum of
9.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-9 °C. However, it dropped to
-19.4 °C in November 2014.
On the warmest days of the month, the temperature usually reaches around
18 °C. However, it reached
23 °C in November 2006.
Precipitation amounts to
20 mm, distributed over 8 days.
The day lasts on average 9 hours and 35 minutes.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is of
7.4 kph.
December is generally a very cold month. The average temperature is of
-0.2 °C, with a minimum of
-4.2 °C and a maximum of
3.8 °C.
On the coldest nights of the month, the temperature usually drops to around
-12.5 °C. However, it dropped to
-25.6 °C in December 2013.
On the warmest days of the month, the temperature usually reaches around
11 °C. However, it reached
15.6 °C in December 2012.
Precipitation amounts to
35 mm, distributed over 11 days.
The day lasts on average 8 hours and 55 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
7.2 kph.