Meteorological Data

Year 2001


A very good year for the first half of it. Then all changed. Noticeable : Total of the precipitations : 735.6 mm, is lowest rainfall since the creation of the Arboretum.
Lowest temperature : -6.9° C (December).
Highest temperature : +34.0° C (August).
Mean yearly temperature : +11.5° C.
Number of days with highest temperature > +30° C : 19.
Number of days with highest temperature > +25° C : 56.
Number of days with highest temperature <     0° C :   2.
Number of days with lowest temperature <      0° C : 40.
Number of days with lowest temperature <    -5° C :   8.
Number of days with lowest temperature <  -10° C :   0.


Year 2000


A rather good year for the growing of the seedlings in the Arboretum. Noticeable : Total of the precipitations : 1054.3 mm, is quite close to the average.
Lowest temperature : -7.4° C (January).
Highest temperature : +32.0° C (August).
Mean yearly temperature : +11.5° C.
Number of days with highest temperature > +30° C :  3.
Number of days with highest temperature > +25° C : 40.
Number of days with highest temperature <     0° C :   0.
Number of days with lowest temperature <      0° C : 50.
Number of days with lowest temperature <    -5° C :   3.
Number of days with lowest temperature <  -10° C :   0.


Year 1999


A good year for the growing of the seedlings in the Arboretum : Two catastrophic events struck France during the last two months of 1999 : Total of the precipitations : 1023.2 mm, is quite close to the average.
Lowest temperature : -7.9° C (December).
Highest temperature : +31.3° C (August).
Mean yearly temperature : +11.2° C.
Number of days with highest temperature > +30° C :  6.
Number of days with highest temperature > +25° C : 54.
Number of days with highest temperature <     0° C :   8.
Number of days with lowest temperature <      0° C : 53.
Number of days with lowest temperature <    -5° C :   6.
Number of days with lowest temperature <  -10° C :   0.


Year 1998


Not a good year for the growing of the seedlings in the Arboretum : The overall yearly precipitation (735.9 mm) is even lower as the total of the previous year (808.7 mm - average 1972-1997 : 1'074.4 mm).
Lowest temperature : -10.4° C (November).
Highest temperature : +34.5° C (August).
Mean yearly temperature : +11.2° C.
Number of days with highest temperature > +30° C : 13.
Number of days with highest temperature > +25° C : 48.
Number of days with highest temperature <     0° C :   0.
Number of days with lowest temperature <      0° C : 63.
Number of days with lowest temperature <    -5° C :   5.
Number of days with lowest temperature <  -10° C :   1.


Year 1997

A short drought at the end of Winter was the only negative factor for the young trees.
The overall yearly precipitation (808.7 mm) is notably inferior to the normal one (average 1972-1997 : 1'074.4 mm).
Lowest temperature : -7.8° C (January).
Highest temperature : +32.9° C (August).
Mean yearly temperature : +12.1° C.
Number of days with highest temperature > +30° C :   7.
Number of days with highest temperature > +25° C : 60.
Number of days with highest temperature <     0° C :   2.
Number of days with lowest temperature <      0° C : 49.
Number of days with lowest temperature <    -5° C :   4.
Number of days with lowest temperature <  -10° C :   0.


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