Last updated: August 21, 2025
January in Rey, Iran, offers a dramatic range of temperatures, with maxima peaking at 16°C (61°F) and plunging to minimums of -12°C (11°F). The average temperature hovers around 4°C (40°F), creating a crisp winter atmosphere. Visitors can expect 34 mm (1.3 in) of precipitation across about six days, contributing to the region's notable 70% humidity. This blend of weather conditions shapes the serene yet vibrant winter landscape of Rey, inviting exploration amidst its historical and cultural richness.
January in Rey, Iran, showcases a striking range of temperatures, starting with a chilly minimum of -12°C (11°F) and peaking at a pleasant 16°C (61°F). This month marks the transition from the cold grips of winter, as the average temperature hovers around 4°C (40°F). As the days unfold, the mercury gradually starts to rise, hinting at the warmer months ahead. The progression from January’s freezing nights to February's slightly more temperate conditions, where the minimum dips to -15°C (6°F) and the maximum extends to 19°C (67°F), sets the stage for a steady increase in temperatures leading into spring. This trend signals the gradual awakening of Rey from its winter slumber, offering a glimpse of nature's impending revival.
In January, Rey, Iran, experiences a modest precipitation total of 34 mm (1.3 in), spread over 6 days of the month. This marks a transition from the drier winter months, as February follows with a notable increase to 53 mm (2.1 in) over 9 days. The trend reveals a peak in early spring, with March and April also showcasing considerable rainfall before the region enters a significantly drier phase during the summer months. By June and July, precipitation plummets to a mere 2 mm (0.1 in) each month, with no rain at all in August and September. This pattern emphasizes Rey's arid climate, where the winter months provide brief relief before a prolonged dry spell settles in through the scorching summer and early autumn. As the year progresses, the rainfall gradually returns in October and November, reflecting the cyclical nature of Rey's weather.
In January, Rey, Iran experiences a notable humidity level of 70%, setting a trend that ebbs and flows throughout the year. As the month progresses into February, moisture content in the air decreases slightly to 66%, followed by a small rebound to 68% in March. The arrival of spring months brings a decline, with April sinking to 62% before inching back up to 64% in May. June maintains this trend, holding steady at 62%, while the summer months introduce a significant drop, with July featuring 52% humidity and August plummeting to 40%. As autumn sets in, humidity begins to rise again, reaching 61% in October, before peaking again in November at 72%. This seasonal cycle ends with December once again at 70%, encapsulating the year with a return to that initial January humidity.
In January, Rey, Iran experiences a moderate UV Index of 4, indicating a burn time of 30 minutes under direct sunlight. As the year progresses, the UV levels steadily rise, with February showing a jump to a high index of 6 and a reduced burn time of 25 minutes. The trend intensifies in the following months, reaching an alarming extreme level of 13 by May, where sun exposure is hazardous with only 10 minutes of safe time before burning. Interestingly, the UV Index begins to decrease after this peak, settling back into the very high range in August and September, before tapering to moderate levels again in late autumn and winter. This fluctuation highlights the need for sun protection, especially during the summer months. For more detailed insights, check the Rey UV Index.
UV Risk Categories
In Rey, Iran, January greets residents with 225 hours of sunshine, marking the beginning of a gradual increase in daylight that peaks in the summer months. As winter fades into spring, February experiences a jump to 270 hours, setting the stage for a remarkable progression through the year. By March and April, sunshine hours rise significantly, reaching 319 and 336 hours respectively, culminating in the dazzling 382 hours of May. This trend continues into the heart of summer, where July shines with an impressive 394 hours. As the seasons transition toward autumn, the sunlight begins to wane, with August tapering to 377 hours and September offering 342 hours, before the year closes with a more subdued 256 hours in November and 267 hours in December. These trends highlight a vibrant annual cycle, where Rey enjoys its sunniest moments in the midst of summer while still savoring the gentle beginnings of warmth at the start of the year.
In January, Rey, Iran, boasts an impressive 81% chance of sunny weather, making it one of the sunniest months of the year. This trend of clear skies continues into February with a still favorable 70% chance, but as spring approaches, the likelihood of sunshine begins to gradually decline, dropping to 58% in March and April. However, the more temperate months of late spring and summer witness a remarkable revival, with June reaching a peak of 97%, followed closely by July and August, ensuring ample sunshine. As the year winds down toward November and December, the chances of sun dip again to 58% and 70%, respectively. Overall, January stands out as a bright start to the year, setting a positive tone for weather enthusiasts.
In Rey, Iran, the variation in daylight duration throughout the year reveals a fascinating rhythm of nature. In January, the day stretches for a solid 10 hours, a length that remains steady through February. As spring approaches in March, daylight begins to increase, reaching 11 hours, and blossoms into longer days by April with 13 hours. The peak of summer in May, June, and July showcases 14 hours of sunlight, offering ample bright moments for outdoor activities. However, as summer wanes into the cooler months, the duration gradually decreases, with August dipping to 13 hours and September further to 12 hours. By the end of the year, daylight returns to 10 hours in November, before entirely retreating to 9 hours in December, signaling a natural rhythm of light that echoes the changing seasons in Rey.
In January, Rey, Iran, greets the new year with a gentle breeze, featuring an average wind speed of 1.5 m/s (or 3 mph). This tranquil start marks the beginning of a gradual increase in wind activity that unfolds through the coming months. As February rolls in, the winds pick up slightly to 1.8 m/s (4 mph), hinting at a subtle rise. This trend continues into March, where the winds strengthen to 2.5 m/s (6 mph), showcasing a lively shift in the atmosphere. Although the wind speeds stabilize around 2.3 m/s (5 mph) in both April and May, there is a notable consistency in the breezy conditions, further enhancing the charm of the region. The summer months maintain this briskness, with July and August remaining at 2.4 m/s (5 mph) and 2.3 m/s (5 mph) respectively, allowing for refreshing afternoons. As the year draws to a close, however, the winds calm down again, returning to a serene pace of 1.5 m/s (3 mph) in both October and December, creating a tranquil farewell to the year. This cyclical rhythm of wind speeds reflects the gentle, yet dynamic, character of Rey's winter weather, transitioning smoothly from calmness to lively breezes.
Weather in Rey varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rey, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February both present chilly weather patterns, yet February shows a slight warming trend. In January, temperatures range from a minimum of -12°C (11°F) to a maximum of 16°C (61°F), with an average temperature of 4°C (40°F). The month experiences about 34 mm (1.3 in) of precipitation over six days and has a humidity level of 70%. In contrast, February has colder minimum temperatures at -15°C (6°F) but offers a slightly higher average of 6°C (44°F) and a maximum of 19°C (67°F). This month sees increased precipitation at 53 mm (2.1 in) over nine days, along with a lower humidity of 66%. For more details on February weather in Rey, you can check Rey weather in February.
In January, the weather tends to be much colder, with temperatures ranging from a minimum of -12°C (11°F) to a maximum of 16°C (61°F), averaging around 4°C (40°F). Precipitation is relatively low at 34 mm (1.3 in) over about 6 days, and humidity levels hover around 70%. In contrast, March brings a significant warming trend, featuring temperatures that range from -1°C (31°F) to an impressive maximum of 29°C (85°F), with an average of 12°C (53°F). Although precipitation increases to 48 mm (1.9 in) over 8 days, the humidity remains slightly lower at 68%. For more details about the weather in March, you can visit Rey weather in March.
January and April exhibit significantly different weather patterns, reflecting the transition from winter to spring. In January, temperatures range from a chilly minimum of -12°C (11°F) to a milder maximum of 16°C (61°F), with an average of 4°C (40°F). The month sees a total precipitation of 34 mm (1.3 in) across about 6 days, accompanied by a relatively high humidity of 70%. In contrast, April brings warmer conditions, with temperatures ranging from a low of 2°C (37°F) to a high of 32°C (91°F), averaging 17°C (64°F). Precipitation increases slightly to 50 mm (2.0 in) over 8 days, although humidity drops to 62%. This shift marks a move towards more favorable weather, making springtime an inviting period—Rey weather in April.
In January, the weather is significantly colder, with temperatures ranging from a frigid minimum of -12°C (11°F) to a mild maximum of 16°C (61°F), accompanied by 34 mm (1.3 in) of precipitation over six days and a humidity level of 70%. In contrast, May brings much warmer conditions, featuring temperatures that span from a minimum of 10°C (50°F) to a scorching maximum of 38°C (100°F). The precipitation in May is relatively low at 19 mm (0.7 in) over just three days, and the humidity decreases to 64%. For more details on the weather during this month, you can visit Rey weather in May.
The contrast between January and June weather is striking. In January, temperatures hover between a chilly -12°C (11°F) and a mild 16°C (61°F), with an average of 4°C (40°F). The month experiences around 34 mm (1.3 in) of precipitation over six days, contributing to a humidity level of 70%. In stark contrast, June sees a significant rise in temperatures, ranging from a low of 17°C (62°F) to a scorching high of 40°C (104°F), with an average temperature of 30°C (86°F). Remarkably, June's precipitation drops to a mere 2 mm (0.1 in) over no rainy days and a lower humidity level of 62%. For a more detailed look at weather patterns, check out Rey weather in June.
January and July present strikingly different weather patterns. In January, temperatures range from a chilly -12°C (11°F) at their lowest to a mild 16°C (61°F) at their peak, with an average temperature of around 4°C (40°F). The month sees about 34 mm (1.3 in) of precipitation over six days, along with a higher humidity level of 70%. In contrast, July features significantly warmer temperatures, with a minimum of 21°C (70°F), an average of 33°C (91°F), and soaring maximums reaching up to 42°C (109°F). This summer month experiences minimal precipitation, with only 2 mm (0.1 in) and no rainfall days, and a drop in humidity to 52%. For more information about the weather in July, you can visit Rey weather in July.
January and August present starkly contrasting weather conditions. In January, temperatures range from a chilly minimum of -12°C (11°F) to an average of 4°C (40°F), with a maximum reaching 16°C (61°F). The month sees about 34 mm (1.3 in) of precipitation over six days, coupled with a high humidity level of 70%. In sharp contrast, August boasts much warmer temperatures, with a minimum of 20°C (67°F) and an average high of 31°C (88°F), peaking at a scorching 41°C (107°F). Notably, August experiences no precipitation whatsoever, making it a dry month with humidity levels dropping to around 40%. For more information on weather patterns, you can check out Rey weather in August.
January and September present stark contrasts in weather. January is characterized by cold temperatures, with a minimum of -12°C (11°F) and an average around 4°C (40°F), reaching a maximum of 16°C (61°F). The month experiences around 34 mm (1.3 in) of precipitation over approximately six days, coupled with a relatively high humidity level of 70%. In contrast, September enjoys much warmer conditions, with temperatures ranging from a minimum of 16°C (61°F) to a scorching maximum of 39°C (102°F), averaging 27°C (80°F). Remarkably, this month sees minimal precipitation at just 1 mm (0.0 in) and has no rainy days, along with a lower humidity of 45%. For more insights on September weather, you can visit Rey weather in September.
January and October present starkly contrasting weather conditions. In January, temperatures can plunge to a minimum of -12°C (11°F) and typically hover around an average of 4°C (40°F), with a maximum reaching only 16°C (61°F). Precipitation is relatively higher, occurring over six days and totaling 34 mm (1.3 in), accompanied by a humidity level of 70%. In contrast, October enjoys much warmer temperatures, with a minimum of 7°C (45°F) and an average of 19°C (66°F), peaking at a pleasant 32°C (91°F). Precipitation decreases to 20 mm (0.8 in) over just four days, and humidity slightly lowers to 61%. For more details, you can check Rey weather in October.
January and November present contrasting weather conditions. January typically experiences much colder temperatures, with lows reaching as low as -12°C (11°F) and averages around 4°C (40°F). In contrast, November offers milder conditions, with minimum temperatures around 0°C (32°F) and average highs reaching 26°C (80°F). Additionally, January sees less precipitation, totaling 34 mm (1.3 in) over about 6 days, whereas November experiences slightly more rain, with 50 mm (2.0 in) over 7 days. Both months have comparable humidity levels, with January at 70% and November slightly higher at 72%. For a detailed overview of November's weather, you can visit Rey weather in November.
In January, the weather is generally colder than in December, with minimum temperatures dropping to -12°C (11°F) compared to December's minimum of -5°C (24°F). Average highs in January reach about 16°C (61°F), while December sees slightly warmer temperatures with a maximum of 19°C (67°F). Both months receive similar levels of precipitation, around 34 mm (1.3 in), but January typically has one less day of rain than December, which averages precipitation over 7 days. Interestingly, humidity remains consistent at 70% for both months, contributing to the overall chilly atmosphere in January. For more detailed information, you can check out Rey weather in December.
January in Rey presents a notable contrast to other months, with its chilly temperatures and increased humidity setting it apart. While the average temperature hovers at a cool 4°C, the minimum can dip dramatically to -12°C, making it the coldest month of the year. Despite the relatively low precipitation of 34 mm over just six days, the crisp air and moisture contribute to a unique winter atmosphere that’s distinct from Rey's warmer seasons. If you're curious about the overall climate patterns in the region, explore more at Rey Climate.