You can display:
Dates and hours of lowest and highest temperature
Lowest, highest and mean temperature
Mean ± Standard deviation

Start to display the values from :

Mean temperature : 14.57°C
Lowest temperature : -2.9°C at 6:00 of 5/1/1990
Highest temperature : 30.1°C at 17:00 of 26/6/1990
Date, hour and temperature of the selection: N/A, 0:00 of 1/1/1990


Is there something not clear? Try this :
0:00 of 1/1/1990
22:00 of 29/6/1990
1990
1995
2000
2005
2010
2012
7 days
30 days
Half a year
1 year
3 years
6 years
0°C
10°C
20°C
30°C