The climate of Georgia is mild and rainy on the coast and in the western plain, while it becomes more continental and arid in the central and eastern inland areas, while in the mountains it's obviously colder.
Here is a map showing the three main climate zones.



Along the coast of the Black Sea and in the western plain (zone 1 on the map), rainfall is abundant, amounting to 1,500 millimetres (60 inches) per year or more, and is distributed fairly evenly throughout the year, albeit with a maximum in autumn and winter.
Here is the average precipitation in Sukhumi, in the northern part of the coast.
Average precipitation - Sokhumi

Sokhumi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Sokhumi	J	F	M	A	M	J	J	A	S	O	N	D	Y
Prec. (mm)	115	120	110	120	100	100	110	115	135	110	130	135	1400
Prec.(in)	4.5	4.7	4.3	4.7	3.9	3.9	4.3	4.5	5.3	4.3	5.1	5.3	55.1
Days	13	13	13	13	13	10	10	9	9	9	10	11	133

Despite the frequent rains, the sunshine amount becomes good in summer, while in winter it is not very good.
Sunshine - Sokhumi

Sokhumi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sokhumi	J	F	M	A	M	J	J	A	S	O	N	D
Sun (hours)	3	3	4	5	7	8	9	9	8	6	4	3

In Batumi, in the southern part of the coast, precipitation reaches as high as 2,500 mm (99 in) per year, with a peak in autumn. Here is the average precipitation.
Average precipitation - Batumi

Batumi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Batumi	J	F	M	A	M	J	J	A	S	O	N	D	Y
Prec. (mm)	240	205	135	140	80	165	180	235	315	260	300	260	2515
Prec.(in)	9.4	8.1	5.3	5.5	3.1	6.5	7.1	9.3	12.4	10.2	11.8	10.2	99
Days	13	14	14	14	13	13	14	14	13	11	13	14	160

Due to the more frequent rains, in the southern part of the coast the sun shines less often in the summer.
Sunshine - Batumi

Batumi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Batumi	J	F	M	A	M	J	J	A	S	O	N	D
Sun (hours)	3	4	4	5	7	8	7	7	7	6	4	3

Winter is fairly mild along the coast, since the average temperature in January is about 7 °C (45 °F); the sea moderates the climate, while the Caucasus Mountains in the north partially protect this area from cold winds, although beyond the Caucasus we find the freezing Russian plains, so sometimes a bit of cold air manages to surpass the mountains and reach the coast: there are on average about ten days with snow per year. Summer is warm or even a little hot, with a daily average around 23 °C (73 °F) in July and August; the sun often shines, but as we said there can be rainfall as well, which in summer occurs mainly in the form of downpour or thunderstorm.
Here are the average temperatures of Batumi.
Average temperatures - Batumi

Batumi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Batumi	J	F	M	A	M	J	J	A	S	O	N	D
Min (°C)	4	4	6	9	13	17	20	20	17	13	9	6
Max (°C)	10	11	12	16	20	24	26	26	24	20	16	13
Min (°F)	39	39	43	48	55	63	68	68	63	55	48	43
Max (°F)	50	52	54	61	68	75	79	79	75	68	61	55

This type of climate is also found in the plain a short distance from the coast, in cities like Kutaisi and Senaki, even though here the summer gets a little hotter for the distance from the sea. In ancient times, this portion of the coastal and western plain was called Colchis.

In the interior (zone 2 on the map), separated from the western plains by some secondary mountain ranges such as the Likhi Mountains, we find valleys and plateaus lying at an altitude between 400 and 1,000 metres (1,300 and 3,300 feet).
In the capital, Tbilisi, located in the valley of the Kura at 450 metres (1,450 ft) above sea level, the climate is slightly continental, and is much more arid than the coast. The average temperature in January is 3 °C (37 °F), that of July is 25 °C (77 °F). Here is the average temperature.
Average temperatures - Tbilisi

Tbilisi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Tbilisi	J	F	M	A	M	J	J	A	S	O	N	D
Min (°C)	-1	0	3	8	12	16	20	20	15	10	5	1
Max (°C)	7	8	13	19	23	28	31	31	26	20	13	8
Min (°F)	30	32	37	46	54	61	68	68	59	50	41	34
Max (°F)	45	46	55	66	73	82	88	88	79	68	55	46

The rainfall amounts to 500 mm (20 in) per year, with a minimum in winter, even though the sky is often cloudy, and a maximum in late spring, in May and June, mainly because of afternoon instability, which can cause showers and thunderstorms, and partly continues even in summer. During winter, snowfall is quite frequent (although not abundant, because of the low level of precipitation), and also cold spells, during which the temperature can drop to about -15 °C (5 °F). Summer is sunny, despite a few afternoon downpours or thunderstorms; there can also be hot days, with maximum temperatures around 36/38 °C (97/100 °F).
Here is the average precipitation.
Average precipitation - Tbilisi

Tbilisi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Tbilisi	J	F	M	A	M	J	J	A	S	O	N	D	Y
Prec. (mm)	20	25	30	50	80	75	45	50	35	40	30	20	495
Prec.(in)	0.8	1	1.2	2	3.1	3	1.8	2	1.4	1.6	1.2	0.8	19.5
Days	4	5	6	8	10	9	6	6	5	6	4	4	71

As mentioned, the sun in Tbilisi often shines in summer, apart from afternoon thunderstorms, while in winter it is not very frequent.
Sunshine - Tbilisi

Tbilisi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Tbilisi	J	F	M	A	M	J	J	A	S	O	N	D
Sun (hours)	3	4	5	5	7	9	9	8	7	6	3	3

Tbilisi is a windy city, and can experience strong winds quite frequently.



The Caucasus Mountains (Greater Caucasus in the north and Lesser Caucasus in the south) and the secondary chains (zone 3 on the map) have an Alpine climate, more or less cold depending on altitude, with heavy snowfalls in winter; there are vast glaciers above 3,500 metres (11,500 ft), especially in the mountains of the Greater Caucasus, which are higher. The highest peak in Georgia is Mount Shkhara, 5,193 metres (17,037 ft) high. Precipitation is particularly abundant in the westernmost mountains: the Mtirala National Park, in the Autonomous Republic of Ajara, receives more than 4,500 mm (177 in) of rain per year.
A dry and warm down-slope wind can blow from the mountains, to the valleys and the coast.

The sea in Georgia is warm enough for swimming from July to September, and reaches 25 °C (77 °F) in July and August.
Sea temperature - Batumi

Batumi	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Batumi	J	F	M	A	M	J	J	A	S	O	N	D
Sea (°C)	10	9	9	11	16	22	25	25	24	20	16	12
Sea (°F)	50	48	48	52	61	72	77	77	75	68	61	54

The best times to visit Georgia are spring and autumn, especially from mid-May to mid-June and from mid-September to mid-October. Since in the coastal area autumn is very rainy, here you may prefer spring. For swimming and sunbathing, and also for hiking in high mountains, the best period is of course the summer, from June to August, when it can get hot in Tbilisi and in inland valleys (but those who can stand the heat can choose this season to visit the whole country).


In winter: in Tbilisi, the plains and the coast, warm clothes, sweater, jacket, hat, raincoat or umbrella. For high mountains, mountain clothing, hiking boots.

In summer: in Tbilisi, light clothes for the day, sun hat, a light sweatshirt for the evening, possibly an umbrella for the afternoon rains; for the coast, light clothing, a light sweatshirt for the evening, a scarf for the breeze; for the mountains, spring/autumn clothes, sun hat, sweater and jacket, hiking shoes, raincoat or umbrella; mountain clothing for the highest peaks.