Table 3. Air temperature (T_a °C) and growing season length (GSL, in days T_a≥5°C) during 2003–2010.

Factor	Period	2003	2004	2005	2006	2007	2008	2009	2010
	Jan.	6.24	5.82	3.38	6.87	5.62	4.19	5.06	6.94
	Feb.	10.51	10.88	5.21	7.70	13.02	5.10	13.37	10.37
Ta (°C)	Mar.	12.10	12.13	11.00	12.35	14.08	14.79	12.48	13.30
	Apr.–Nov.	23.54	22.80	23.15	22.70	22.53	22.84	22.58	21.74
	Dec.	7.67	8.82	6.56	7.42	9.08	8.58	7.69	8.49
	Jan.	20	19	6	21	19	9	13	21
GSL	Feb.	23	22	11	20	28	14	26	19
(≥5°C)	Mar.	28	31	28	28	28	31	26	27
	Apr– Nov.	244	244	244	244	244	244	239	244
	Dec.	27	22	23	29	30	28	25	25