Weather in Grand Island

Planning a trip or just curious about the weather in Grand Island? In this section, you will find up-to-date information on weather conditions, as well as detailed forecasts and useful charts.

The climate in Grand Island, United States, is characterised as continental, with four distinct seasons. The city experiences significant temperature fluctuations throughout the year, which is typical for this type of climate. Visitors should be prepared for a variety of weather conditions depending on the time of their trip.

Winters in Grand Island are cold, with average temperatures in January and February below zero degrees Celsius. Summers, on the other hand, are warm and even hot, especially in July and August, when average temperatures rise above 20°C. Spring and autumn are transitional seasons with moderate temperatures. Precipitation is distributed relatively evenly throughout the year, without a distinct rainy season, and averages a small amount monthly, with the number of days with precipitation varying from 9 to 15 per month.

In Grand Island, there is a distinct change of seasons with a noticeable contrast in temperatures throughout the year. The coldest month is January, when the average temperature drops to -2.2°C, and night frosts can reach an average of -5.1°C, while daytime highs barely exceed 0°C. Conversely, July brings the hottest weather: the average temperature is a comfortable 23.0°C, with daytime peaks averaging 26.3°C and warm nights around 19.7°C.

The summer months in Grand Island, especially June, July, and August, are characterised by warm, and at times hot weather. Average maximum daytime temperatures during this period range from approximately 23°C to 26°C, creating pleasant conditions for walks and outdoor activities. Winter, covering December, January, and February, brings cold weather. Daily average temperatures often stay around or below freezing, especially in January, which is the peak of the winter cold. Night frosts are a common occurrence, and daytime temperatures during the coldest periods rarely rise significantly above the freezing point.

The transitional seasons, spring (March-May) and autumn (September-November), are distinguished by a gradual change in temperature regimes. Spring sees noticeable warming: in April, the average temperature already reaches 7.8°C, and in May, 14.0°C. In autumn, the temperature smoothly decreases from September averages of 19.5°C to 6.1°C in November, preparing the city for winter. Moderate daily temperature fluctuations are observed throughout the year, usually within the range of 5-8°C. This means evenings can be noticeably cooler than days, especially in the spring and autumn months, which is worth considering when planning evening activities.

In the city of Grand Island, precipitation is distributed quite evenly throughout the year, without a pronounced rainy or dry season. The total amount of precipitation in any given month is small, fluctuating between 2-4 mm. This suggests that the region is characterised by frequent, but not intense precipitation.

In winter, from December to February, when average temperatures drop below freezing (for example, in January the average temperature is -2.2°C, and in December 1.4°C with lows below freezing), precipitation falls primarily as snow. For instance, January and December see about 14 days with precipitation, while the total amount is only 3 mm, indicating light snowfalls. In spring and autumn, precipitation is also frequent, but in the form of rain. October stands out with the highest number of days with precipitation – as many as 15 – although the volume of moisture (3 mm) remains small.

The highest volume of precipitation (4 mm) falls in April and July. These months also see a significant number of days with precipitation (14 and 12 days respectively). The "driest" months in terms of volume are March, May, and September (2 mm each). Meanwhile, September is also distinguished by the fewest number of days with precipitation – just 9. Thus, although precipitation in Grand Island occurs regularly throughout the year, it is generally moderate or light in nature.

When planning a trip to Grand Island, it is important to consider its continental climate with distinct seasons. Summer (June-August) here is warm, with average temperatures around 20-23°C, so light clothing such as t-shirts, shorts, skirts, and sandals will be very appropriate. Don't forget sunscreen and a hat, especially if you plan to spend a lot of time outdoors. Evenings can be slightly cooler, so a light sweater or cardigan will come in handy. Although the amount of rainfall is small (averaging 3-4 mm per month), rainy days do happen (about 11-12 per month), so a compact umbrella or a light waterproof jacket might prove useful.

Winter (December-February) in Grand Island is cold, with average temperatures ranging from +1.4°C in December to -2.2°C in January, and minimums that can drop to -5.1°C (especially in January). You will definitely need warm clothing: a winter jacket, hat, gloves, scarf, and warm boots. The principle of layering will be perfect here – thermal underwear, sweaters, and fleece jackets will help keep the warmth. Despite the small amount of precipitation (about 3 mm per month), the number of days with precipitation (likely snow or freezing rain) reaches 12-14 per month, so waterproof and windproof outerwear will be essential.

Spring (March-May) and autumn (September-November) are transitional seasons with changeable weather. Temperatures in spring gradually rise from cool (averaging 3.0°C in March) to moderate (14.0°C in May), while in autumn, conversely, they drop from a comfortable 19.5°C in September to a cool 6.1°C in November. During these periods, it is best to dress in layers: t-shirts, long-sleeved shirts, jeans or trousers, as well as a demi-season jacket or coat. Comfortable closed-toe shoes are necessary for walking. An umbrella or raincoat is also worth keeping close at hand, as the number of rainy days varies from 9 to 15 per month, although the precipitation itself is usually not heavy.