Climate Chart of Bismarck, USA

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Bismarck, USA, the climate data cover 2013–2023, showing a wide contrast in monthly mean temperatures between the coldest and warmest points of the year. Sunshine and daily rainfall also vary by month, while recorded snowfall adds another consideration for visitors. These figures describe monthly averages rather than the conditions on any particular day, so they are useful for setting expectations but cannot guarantee what a trip will bring.

Climate overview

Temperature

Monthly mean temperatures reach their highest point in July at 22.6 °C, while the lowest monthly mean is -9.4 °C in January. The annual pattern therefore spans warm and cold monthly averages; these are not daytime highs and lows, and individual days may differ from the monthly mean. The unweighted mean of the monthly temperature means is 6.4 °C. It offers a broad summary across the calendar months, rather than a day-weighted annual average or a description of conditions throughout a typical day.

Rain

Mean daily rainfall is highest in June at 2.61 mm/day. This is a monthly average of daily amounts, not a monthly total, and it does not indicate how often rain falls or whether a particular day will be wet. The lowest mean daily rainfall is shared by January / February, at 0.08 mm/day. The unweighted mean across monthly daily-rainfall means is 1.09 mm/day; neither figure guarantees dry weather on a visit.

Snow

Mean daily snowfall reaches its highest monthly value in December at 5.67 mm/day. The unweighted mean across monthly daily-snowfall means is 2.21 mm/day. These averages do not establish how many snowy days occur, the snow depth or cover, or whether conditions suit skiing.

Sunshine

Mean daily sunshine reaches its highest value in July at 13.01 hours/day, and its lowest in December at 5.10 hours/day. These are averages of sunshine duration, not measures of day length, and actual daily conditions can vary. Across the calendar months, the unweighted mean of mean daily sunshine is 8.82 hours/day. This provides a broad reference rather than a forecast for the amount of sunshine during a particular stay.

Best Travel Time Guide for Bismarck, USA: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, January / February is the conditional option, with mean daily rainfall of 0.08 mm/day. That average cannot promise dry days or show how frequently rain occurs, so flexible plans and weather checks remain useful. Rain preparation is especially relevant in June, when mean daily rainfall is 2.61 mm/day. This is an average daily amount, not a monthly accumulation or a prediction for any particular date.

If cooler monthly averages are the priority, consider January, whose monthly mean temperature is -9.4 °C; this does not describe daytime highs or guarantee the temperature on travel dates. For outdoor sightseeing planned around sunshine, July has the highest mean daily sunshine duration at 13.01 hours/day, while December has the lowest at 5.10 hours/day. Sunshine duration is not day length, and these separate criteria do not amount to a single best-month ranking.

Climate Data Overview for Bismarck, USA

Explore the comprehensive climate data for Bismarck, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Snow (mm) / day	Sunshine (h) / day
Jan	-9.4	0.08	2.94	5.60
Feb	-9.2	0.08	3.12	7.35
Mar	-1.8	0.17	4.33	8.48
Apr	4.2	0.98	4.49	9.10
May	13.2	2.19	0.61	10.67
Jun	19.8	2.61	0.00	12.45
Jul	22.6	1.71	0.00	13.01
Aug	21.4	2.02	0.00	11.28
Sep	16.8	1.73	0.03	9.37
Oct	7.7	1.19	2.01	7.34
Nov	-0.5	0.19	3.31	6.13
Dec	-7.6	0.09	5.67	5.10
Average	6.4	1.09	2.21	8.82