The climate of the Friulian plain is humid sub-Mediterranean.
The climate in this area is suitable for growing white wine grapes, and 2.5% of wine produced in Italy comes from this part of the region.
 The hills, however, have a continental climate, and the mountainous regions have an alpine climate.
On the coast the mean annual temperature is 14 °C (57 °F), while in the inner plains, the average is lowered to 13 to 13.5 °C (55.4 to 56.3 °F; Udine 13.1 °C (55.6 °F), Pordenone 13.3 °C (55.9 °F), Gorizia 13.4 °C (56.1 °F)).
Further north, in Tolmezzo, the average temperature is approximately 10.6 °C (51.1 °F).
The lowest values are recorded in the Alps: 4 °C (39 °F) at Passo di Monte Croce Carnico (at 1,300 metres / 4,300 ft) and between 5.5 and 7 °C (41.9–44.6 °F) in Val Canale, which is situated 850 metres (2,790 ft) above sea level.
In the coldest month, January, temperatures vary between approximately 4.5 °C (40.1 °F) in Monfalcone and nearly −5 °C (23 °F) in Passo di Monte Croce Carnico, with intermediate temperatures of 3 °C (37 °F) in Udine and −2 or −3 °C (28 or 27 °F) in Valcanale.
Gorizia, a short distance from Udine, enjoys a particularly milder micro-climate with its approximate annual average of 4 °C (39 °F).
In the warmest month, July, the temperatures range between 22.5 and 24 °C (72.5–75.2 °F) along the coast and plains and between 14 and 16 °C (57–61 °F) in Val Canale.

Precipitation in Friuli is relatively abundant; the distribution of rainfall varies a great deal during the course of the year.
Minimum values in the southern part generally fall between 1,200 and 1,500 mm (47–59 in) (Gorizia over 1,350 mm (53 in) and Udine over 1,400 mm (55 in)), whereas the alpine area's maximum annual rainfall is approximately 3,000 mm (120 in).
The Julian Prealps is one of Italy's rainiest regions: Musi receives about 3,300 mm (130 in) of annual precipitation, sometimes even 5000 mm, and can receive 400 mm (16 in) in a single month.
In some areas of Friuli, excessive rainfall has caused erosion and the flooding of many rivers.
Snow is sparse in the southern plains (3 or 4 snowy days each year in Udine and Pordenone) but falls more consistently further to the north (Val Canale 25 days, Sauris 23 days, and Passo di Monte Croce Carnico 28 days).

The following weatherbox is from Udine, the main city of Friuli.
The climate of the Friulian plain is humid sub-Mediterranean. The climate in this area is suitable for growing white wine grapes, and 2.5% of wine produced in Italy comes from this part of the region.  The hills, however, have a continental climate, and the mountainous regions have an alpine climate. On the coast the mean annual temperature is 14 °C (57 °F), while in the inner plains, the average is lowered to 13 to 13.5 °C (55.4 to 56.3 °F; Udine 13.1 °C (55.6 °F), Pordenone 13.3 °C (55.9 °F), Gorizia 13.4 °C (56.1 °F)). Further north, in Tolmezzo, the average temperature is approximately 10.6 °C (51.1 °F). The lowest values are recorded in the Alps: 4 °C (39 °F) at Passo di Monte Croce Carnico (at 1,300 metres / 4,300 ft) and between 5.5 and 7 °C (41.9–44.6 °F) in Val Canale, which is situated 850 metres (2,790 ft) above sea level. In the coldest month, January, temperatures vary between approximately 4.5 °C (40.1 °F) in Monfalcone and nearly −5 °C (23 °F) in Passo di Monte Croce Carnico, with intermediate temperatures of 3 °C (37 °F) in Udine and −2 or −3 °C (28 or 27 °F) in Valcanale. Gorizia, a short distance from Udine, enjoys a particularly milder micro-climate with its approximate annual average of 4 °C (39 °F). In the warmest month, July, the temperatures range between 22.5 and 24 °C (72.5–75.2 °F) along the coast and plains and between 14 and 16 °C (57–61 °F) in Val Canale.
Precipitation in Friuli is relatively abundant; the distribution of rainfall varies a great deal during the course of the year. Minimum values in the southern part generally fall between 1,200 and 1,500 mm (47–59 in) (Gorizia over 1,350 mm (53 in) and Udine over 1,400 mm (55 in)), whereas the alpine area's maximum annual rainfall is approximately 3,000 mm (120 in). The Julian Prealps is one of Italy's rainiest regions: Musi receives about 3,300 mm (130 in) of annual precipitation, sometimes even 5000 mm, and can receive 400 mm (16 in) in a single month. In some areas of Friuli, excessive rainfall has caused erosion and the flooding of many rivers. Snow is sparse in the southern plains (3 or 4 snowy days each year in Udine and Pordenone) but falls more consistently further to the north (Val Canale 25 days, Sauris 23 days, and Passo di Monte Croce Carnico 28 days).
The following weatherbox is from Udine, the main city of Friuli.
Friuli