-Jan., 1903 .] Some Climatic Conditions of Ohio. 
34i 
Maximum Monthly Precipitation. 
Another phase of the subject of precipitation which is of some 
importance ecologically is that of the maximum and minimum 
monthly precipitation. The records here again indicate Yen- 
interesting differences in the state. Throughout the southwestern 
part of Ohio March is the wettest month of the year. The range 
was from 5.69 in. at Cincinnati to 9.02 in. at Portsmouth for the 
region having the maximum precipitation in March. With the 
exception of Milligan, with a maximum of 6.64 inches in June, 
the remainder of the state lias its rainiest season in July with 
maxima ranging from 4.63 inches at Cleveland to 6.95 inches at 
Ashtabula. 
Minimum Monthly Precipitation. 
For the minimum monthly precipitation fourteen of the fifteen 
stations report October, the range being from 0.85 inches at 
Clarksville to 1.29 inches at Ashtabula. The one station not 
agreeing with the above was Sandusky with a minimum of 0.95 
inches in December. 
Rainy Days. (Plate III Map III.) 
The region bordering Lake Erie, as might Ire suspected, leads 
the state in the total number of rainy (or snowy) days per Year. 
Cleveland has precipitation 150 days in the year, while in the 
extreme* northwestern and in the southeastern part of the state 
the number falls to below 100. 
Clear Days Per Year. (Plate III Map IV.) 
Sandusky reports the least number of clear days (69) while 
Ashtabula reports the greatest number, — over 160. Just why 
this should be is rather difficult to say. It was thought that 
perhaps some of the difference might be due to the shortness of 
record at Ashtabula (6 years ) or to a lack of uniformity in sky 
observations at different stations, but the examination of the 
records of neighboring stations seemed to confirm the reliability 
of Ashtabula’s records as averages of that locality. 
Cloudy Days. 
The number of cloudy days follows about the same order as 
the rainy days. A strip running south and west from Sandusky 
to Cincinnati through the central part of the state, includes the 
region having the greatest number of cloudy days. Saudusky 
leads with 169 per year. 
