Given a table of orders with columns OrderID, CustomerID, and OrderDate, write a SQL query to find the number of orders each customer has made in the month of January.

Assuming the orders table is named "Orders", the SQL query would be:

```
SELECT CustomerID, COUNT(OrderID) AS NumOrders
FROM Orders
WHERE MONTH(OrderDate) = 1
GROUP BY CustomerID
```

This query uses the MONTH() function to extract the month from the OrderDate column and filters for the month of January. The result is grouped by CustomerID and the COUNT() function is used to count the number of orders made by each customer during that month. The alias "NumOrders" is assigned to this calculated column.