Pomona

Find the latest information about weather conditions in Pomona. In this section, you will find up-to-date data, detailed forecasts, and helpful weather charts to help you plan your time in the city.

The climate in Pomona, located in the USA, can be described as Mediterranean with semi-arid characteristics. This means the city boasts an abundance of sunny days throughout the year, making it an attractive destination to visit at almost any time, depending on your temperature preferences and vacation plans.

Pomona has clearly defined seasons. Summer, which lasts roughly from June to September, is hot and exceptionally dry. Average high temperatures in July and August consistently hold at around 32.3°C, while precipitation in these months is virtually non-existent (0 mm). Winters, from December to March, are mild and relatively wetter, although total precipitation remains low. Average temperatures during the winter months hover around 11-12°C, with daily highs of about 17°C. Winter accounts for the main, albeit small, share of annual precipitation; for example, in March, about 4 mm of rain falls over approximately 12 days.

Spring (April-May) and autumn (October-November) are comfortable transitional periods with pleasant temperatures. However, the most striking feature of Pomona's climate is the prolonged dry season, which spans from May to October, when rain is a rare occurrence and precipitation is zero. Travelers can expect mostly clear weather with a minimal chance of rain, especially during the summer and autumn months.

The climate in Pomona is characterized by pronounced seasonal changes in temperature regimes. The hottest months are July and August, when the average temperature is around 25.7-25.8°C. During these summer months, daytime highs regularly reach 32.3°C. The coolest month of the year is February, with an average temperature of 11.3°C, while the average minimum temperature drops to 5.5°C and the daily maximum is about 17.1°C. January is also quite cool, with averages close to February's levels.

The summer period in Pomona, which lasts roughly from June to September, is marked by hot and dry weather. Average daytime temperatures in June already reach 28.5°C, and in July and August, they consistently exceed 32°C. One of the characteristic features of the local climate is the noticeable daily temperature fluctuations. The difference between day and night temperatures can be quite significant; for example, in July and August, it is about 13°C (32.3°C maximum and 19.0-19.2°C minimum). This means that even after a hot day, evenings and nights can be considerably cooler. Precipitation during the summer months is virtually absent.

Winter in Pomona, covering the period from December to March, is generally mild and cool. Monthly average temperatures during this time range from 11.3°C to 12.1°C. Minimum nighttime temperatures can drop to 5.5-6.8°C, making evenings and nights quite fresh, while daytime highs usually stay within a comfortable 17-17.6°C range. The spring (April, May) and autumn (October, November) months are transitional, with a gradual increase or decrease in heat, offering pleasant temperature conditions for visiting the city.

Pomona exhibits a distinct seasonality in precipitation distribution throughout the year. The city is characterized by a long dry season and a shorter, relatively wet period, occurring mainly during the winter and early spring months. Snow is untypical for this region given the average monthly temperatures.

The driest period in Pomona lasts from May to October. During these months, especially from June to August, precipitation is practically non-existent—averaging 0 mm. The number of rainy days during this period is minimal: for example, June, July, and August average only one day of rain each. Thus, summer and early autumn are the times with the most sunny days and the lowest probability of rain.

The relatively wet season falls between November and March. March stands out as the wettest month: on average, about 4 mm of precipitation falls, and the number of rainy days reaches 12. January and February also bring some moisture (3 mm each) and have 6 and 7 rainy days, respectively. December is also relatively wet with 2 mm of precipitation and 6 rainy days. Overall, even in the "wettest" months, total precipitation is low, indicating that rainfall is mostly light in nature.

When planning a trip to Pomona, it is worth considering its predominantly warm and dry climate. In summer, from June to September, it is hot and sunny here, with average highs often exceeding 30°C and almost no precipitation. Therefore, the core of your wardrobe should consist of light, breathable clothing made from natural fabrics, shorts, t-shirts, sundresses, and sandals. Be sure to bring high-SPF sunscreen, a hat (cap or wide-brimmed hat), and sunglasses, as the California sun is very active. Comfortable walking shoes are also essential if you plan to explore the city and its surroundings.

During the winter months (December to March) and in the transitional seasons (April, May, October, November), the weather in Pomona becomes significantly cooler, especially in the evenings and mornings, with average temperatures around 11-17°C during the day and lows dropping to 5-10°C. Layering is the ideal strategy during this period: t-shirts or long-sleeved shirts can be topped with a sweater or fleece, along with a light jacket or windbreaker. Although precipitation is low (maxing out at about 4 mm per month with 6-12 rainy days between January and March), a compact umbrella or light raincoat might come in handy. Even in warmer months, evenings can be cool, so a light sweater or jacket will be useful year-round.