<Tr> <Th> Percent possible sunshine </Th> <Td> 55 </Td> <Td> 61 </Td> <Td> 59 </Td> <Td> 60 </Td> <Td> 64 </Td> <Td> 69 </Td> <Td> 74 </Td> <Td> 71 </Td> <Td> 62 </Td> <Td> 53 </Td> <Td> 39 </Td> <Td> 42 </Td> <Td> 59 </Td> </Tr> <Tr> <Td_colspan="14"> Source #1: NOAA (relative humidity and sun 1961 − 1990) </Td> </Tr> <Tr> <Td_colspan="14"> Source #2: The Weather Channel </Td> </Tr> <P> Even though winter does not officially start until late December, Minnesota usually begins experiencing winter - like conditions in November, sometimes as early as October . As with many other Midwestern states, winter in Minnesota is characterized by cold (below freezing) temperatures and snowfall . Weather systems can move in from the north, west, or south, with the majority of the weather being driven in from the north . A vigorous jet stream brings high and low - pressure systems through in quick succession, which can cause large temperature variations over a short period of time . </P>

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