Bierzo is a transition between Mediterranean and Atlantic climates with local characteristics depending on altitude, orientation, tilt, alignment with the mountain range, etc.

In the province of León, the temperatures are higher in the lower areas with little rainfall. Higher in the mountains the average rainfall is usually more than 1’000 mm. per year with a maximum of 1’600 mm. in the mountains of the northwest (with also heavy snowfall). The closer we come down to the depression where Bierzo is located, the lower the rainfall with an average in Bierzo of 600 mm. per year. As far as temperature is concerned, the annual average of the province is 11.2ºC with a usual temperature of 8ºC in the mountains and 13ºC in Bierzo.

The climate of the province is Mediterranean with a continental influence of the Plateau, but with higher values for the usual minimum temperatures, more rainfall and lower values for the maximum summer temperatures. The closer we get to the mountains, the more Atlantic influenced the climate will be with milder temperatures and more rainfall. As from 1’600 metres high, we may experience the toughest and extreme conditions in areas facing northwest and northeast. However, in the valley, where the Sil river flows, the average annual temperature is around 14ºC.

In winter the maximum temperature doesn’t exceed 5ºC and in summer (specially in July and August) the average temperature is around 21ºC. The curve showing the average rainfall drops during these months to be lower than the average temperature and therefore points out a water deficit in July and August. From November till March, with temperatures not surpassing 5ºC, we may experience frosts. The average temperature and rainfall clearly show the strong Atlantic influence during this period.

All these factors define the specific microclimate of Bierzo, also pointing out very special conditions in some areas.

Climatological values . Ponferrada

Period: 1971-2000 -  Altitude (m): 534
Latitude: 42° 33' 50'' N - Longitude: 6° 36' 0'' O - 

Month	T	TM	Tm	R	H	DR	DN	DT	DF	DH	DD	I
January	4.5	8.1	1.0	71	83	9	2	0	6	13	6	85
February	6.8	11.4	2.3	64	75	8	2	0	1	8	5	102
March	9.4	15.0	3.7	43	67	8	1	0	0	4	7	156
April	11.1	16.8	5.5	51	66	9	0	1	0	1	5	187
May	14.4	20.4	8.5	59	66	10	0	2	0	0	4	196
June	18.6	25.4	11.8	34	61	6	0	3	0	0	6	268
July	21.5	28.9	14.1	24	58	4	0	3	0	0	11	307
August	21.0	28.4	13.6	26	59	3	0	2	0	0	11	287
September	17.9	24.3	11.4	49	65	6	0	1	0	0	10	217
October	12.9	17.8	7.9	74	76	9	0	0	2	0	5	156
November	8.2	12.1	4.3	76	82	9	0	0	5	5	7	109
December	5.5	8.7	2.2	92	84	11	1	0	8	10	5	63
Year	12.6	18.1	7.2	668	70	93	6	13	23	40	82	2113

                                  Legend